400432715 has 16 divisors (see below), whose sum is σ = 492410880. Its totient is φ = 312465120.

The previous prime is 400432693. The next prime is 400432717. The reversal of 400432715 is 517234004.

It is not a de Polignac number, because 400432715 - 2¹⁶ = 400367179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400432717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70346 + ... + 75824.

It is an arithmetic number, because the mean of its divisors is an integer number (30775680).

Almost surely, 2^400432715 is an apocalyptic number.

400432715 is a deficient number, since it is larger than the sum of its proper divisors (91978165).

400432715 is a wasteful number, since it uses less digits than its factorization.

400432715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5842.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 400432715 is about 20010.8149509209. The cubic root of 400432715 is about 737.0718932608.

Adding to 400432715 its reverse (517234004), we get a palindrome (917666719).

The spelling of 400432715 in words is "four hundred million, four hundred thirty-two thousand, seven hundred fifteen".