400432965 has 16 divisors (see below), whose sum is σ = 641044800. Its totient is φ = 213446912.

The previous prime is 400432939. The next prime is 400432979. The reversal of 400432965 is 569234004.

It is a cyclic number.

It is not a de Polignac number, because 400432965 - 2⁵ = 400432933 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25666 + ... + 38204.

It is an arithmetic number, because the mean of its divisors is an integer number (40065300).

Almost surely, 2^400432965 is an apocalyptic number.

It is an amenable number.

400432965 is a deficient number, since it is larger than the sum of its proper divisors (240611835).

400432965 is a wasteful number, since it uses less digits than its factorization.

400432965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14676.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 400432965 is about 20010.8211975421. The cubic root of 400432965 is about 737.0720466515.

Adding to 400432965 its reverse (569234004), we get a palindrome (969666969).

The spelling of 400432965 in words is "four hundred million, four hundred thirty-two thousand, nine hundred sixty-five".