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538793640 = 2333571121931
BaseRepresentation
bin100000000111010…
…101011010101000
31101112211112221000
4200013111122220
52100412344030
6125244115000
716231445640
oct4007253250
91345745830
10538793640
11257153700
12130535a60
1387818808
14517b3520
153247c860
hex201d56a8

538793640 has 768 divisors, whose sum is σ = 2451456000. Its totient is φ = 102643200.

The previous prime is 538793617. The next prime is 538793657. The reversal of 538793640 is 46397835.

538793640 is a `hidden beast` number, since 538 + 79 + 3 + 6 + 40 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 17380425 + ... + 17380455.

It is an arithmetic number, because the mean of its divisors is an integer number (3192000).

Almost surely, 2538793640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 538793640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1225728000).

538793640 is an abundant number, since it is smaller than the sum of its proper divisors (1912662360).

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

538793640 is a wasteful number, since it uses less digits than its factorization.

538793640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 538793640 is about 23211.9288298065. The cubic root of 538793640 is about 813.7184319551.

The spelling of 538793640 in words is "five hundred thirty-eight million, seven hundred ninety-three thousand, six hundred forty".