400660457 has 8 divisors (see below), whose sum is σ = 412110912. Its totient is φ = 389242800.

The previous prime is 400660453. The next prime is 400660459. The reversal of 400660457 is 754066004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400660457 - 2² = 400660453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400660451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17732 + ... + 33402.

It is an arithmetic number, because the mean of its divisors is an integer number (51513864).

Almost surely, 2^400660457 is an apocalyptic number.

It is an amenable number.

400660457 is a deficient number, since it is larger than the sum of its proper divisors (11450455).

400660457 is a wasteful number, since it uses less digits than its factorization.

400660457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16399.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 400660457 is about 20016.5046149421. The cubic root of 400660457 is about 737.2116008052.

The spelling of 400660457 in words is "four hundred million, six hundred sixty thousand, four hundred fifty-seven".