400225965 has 16 divisors (see below), whose sum is σ = 661019136. Its totient is φ = 206568000.

The previous prime is 400225961. The next prime is 400225993. The reversal of 400225965 is 569522004.

It is not a de Polignac number, because 400225965 - 2² = 400225961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400225961) 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, 429886 + ... + 430815.

It is an arithmetic number, because the mean of its divisors is an integer number (41313696).

Almost surely, 2^400225965 is an apocalyptic number.

It is an amenable number.

400225965 is a deficient number, since it is larger than the sum of its proper divisors (260793171).

400225965 is a wasteful number, since it uses less digits than its factorization.

400225965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860740.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 400225965 is about 20005.6483274099. The cubic root of 400225965 is about 736.9450173065.

Adding to 400225965 its reverse (569522004), we get a palindrome (969747969).

The spelling of 400225965 in words is "four hundred million, two hundred twenty-five thousand, nine hundred sixty-five".