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618980440 = 235131190347
BaseRepresentation
bin100100111001001…
…110010001011000
31121010201110112111
4210321032101120
52231424333230
6141230522104
721224150461
oct4471162130
91533643474
10618980440
11298442191
12153366334
139b312c20
145c2c7d68
153951b92a
hex24e4e458

618980440 has 32 divisors (see below), whose sum is σ = 1499838480. Its totient is φ = 228546432.

The previous prime is 618980339. The next prime is 618980443. The reversal of 618980440 is 44089816.

It is a Smith number, since the sum of its digits (40) 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 (40).

It is a junction number, because it is equal to n+sod(n) for n = 618980393 and 618980402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618980443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594654 + ... + 595693.

Almost surely, 2618980440 is an apocalyptic number.

It is an amenable number.

618980440 is an abundant number, since it is smaller than the sum of its proper divisors (880858040).

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

618980440 is a wasteful number, since it uses less digits than its factorization.

618980440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190371 (or 1190367 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 618980440 is about 24879.3175147551. The cubic root of 618980440 is about 852.2342328793.

The spelling of 618980440 in words is "six hundred eighteen million, nine hundred eighty thousand, four hundred forty".