400857704 has 32 divisors (see below), whose sum is σ = 831308520. Its totient is φ = 180009216.

The previous prime is 400857701. The next prime is 400857707. The reversal of 400857704 is 407758004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (400857701) and next prime (400857707).

It can be written as a sum of positive squares in 4 ways, for example, as 316768804 + 84088900 = 17798^2 + 9170^2 .

It is not an unprimeable number, because it can be changed into a prime (400857701) 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, 48239 + ... + 55934.

Almost surely, 2^400857704 is an apocalyptic number.

It is an amenable number.

400857704 is an abundant number, since it is smaller than the sum of its proper divisors (430450816).

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

400857704 is a wasteful number, since it uses less digits than its factorization.

400857704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104229 (or 104225 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 400857704 is about 20021.4311176799. The cubic root of 400857704 is about 737.3325585206.

The spelling of 400857704 in words is "four hundred million, eight hundred fifty-seven thousand, seven hundred four".