457056640 has 32 divisors (see below), whose sum is σ = 1092652560. Its totient is φ = 182822400.

The previous prime is 457056581. The next prime is 457056689. The reversal of 457056640 is 46650754.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 457056640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356436 + ... + 357715.

Almost surely, 2^457056640 is an apocalyptic number.

457056640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

457056640 is an abundant number, since it is smaller than the sum of its proper divisors (635595920).

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

457056640 is an equidigital number, since it uses as much as digits as its factorization.

457056640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714170 (or 714158 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 457056640 is about 21378.8830391113. The cubic root of 457056640 is about 770.2942822982.

The spelling of 457056640 in words is "four hundred fifty-seven million, fifty-six thousand, six hundred forty".