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1998545454 = 233371000273
BaseRepresentation
bin111011100011111…
…0110001000101110
312011021121121222000
41313013312020232
513043111423304
6530151433130
7100345233063
oct16707661056
95137547860
101998545454
11936143864
124793857a6
1325b088299
1414d5dac6a
15ba6c6939
hex771f622e

1998545454 has 32 divisors (see below), whose sum is σ = 4561249440. Its totient is φ = 648176256.

The previous prime is 1998545447. The next prime is 1998545467. The reversal of 1998545454 is 4545458991.

1998545454 is a `hidden beast` number, since 1 + 9 + 98 + 5 + 4 + 545 + 4 = 666.

It is a super-2 number, since 2×19985454542 = 7988367863408132232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

1998545454 is a modest number, since divided by 545454 gives 1998 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1998545454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498139 + ... + 502134.

It is an arithmetic number, because the mean of its divisors is an integer number (142539045).

Almost surely, 21998545454 is an apocalyptic number.

1998545454 is an abundant number, since it is smaller than the sum of its proper divisors (2562703986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1998545454 is a wasteful number, since it uses less digits than its factorization.

1998545454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000321 (or 1000315 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The square root of 1998545454 is about 44705.0942734718. The cubic root of 1998545454 is about 1259.6155402994.

The spelling of 1998545454 in words is "one billion, nine hundred ninety-eight million, five hundred forty-five thousand, four hundred fifty-four".

Divisors: 1 2 3 6 9 18 27 37 54 74 111 222 333 666 999 1998 1000273 2000546 3000819 6001638 9002457 18004914 27007371 37010101 54014742 74020202 111030303 222060606 333090909 666181818 999272727 1998545454