298043640 has 48 divisors (see below), whose sum is σ = 968643000. Its totient is φ = 79478208.

The previous prime is 298043639. The next prime is 298043653. The reversal of 298043640 is 46340892.

It is a happy number.

298043640 is a `hidden beast` number, since 2 + 9 + 8 + 0 + 4 + 3 + 640 = 666.

It is a super-2 number, since 2×298043640² = 177660022688899200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 298043595 and 298043604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 413590 + ... + 414309.

Almost surely, 2^298043640 is an apocalyptic number.

298043640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

298043640 is an abundant number, since it is smaller than the sum of its proper divisors (670599360).

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

298043640 is a wasteful number, since it uses less digits than its factorization.

298043640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827916 (or 827909 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 298043640 is about 17263.9404540215. The cubic root of 298043640 is about 667.9746067056.

The spelling of 298043640 in words is "two hundred ninety-eight million, forty-three thousand, six hundred forty".