400057538 has 8 divisors (see below), whose sum is σ = 626177088. Its totient is φ = 191331844.

The previous prime is 400057531. The next prime is 400057543. The reversal of 400057538 is 835750004.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (400057531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4348406 + ... + 4348497.

It is an arithmetic number, because the mean of its divisors is an integer number (78272136).

Almost surely, 2^400057538 is an apocalyptic number.

400057538 is a deficient number, since it is larger than the sum of its proper divisors (226119550).

400057538 is a wasteful number, since it uses less digits than its factorization.

400057538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8696928.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 400057538 is about 20001.4383982753. The cubic root of 400057538 is about 736.8416266683.

The spelling of 400057538 in words is "four hundred million, fifty-seven thousand, five hundred thirty-eight".