400432259 has 4 divisors (see below), whose sum is σ = 401799216. Its totient is φ = 399065304.

The previous prime is 400432237. The next prime is 400432283. The reversal of 400432259 is 952234004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400432259 - 2⁸ = 400432003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400432289) 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, 683039 + ... + 683624.

It is an arithmetic number, because the mean of its divisors is an integer number (100449804).

Almost surely, 2^400432259 is an apocalyptic number.

400432259 is a deficient number, since it is larger than the sum of its proper divisors (1366957).

400432259 is a wasteful number, since it uses less digits than its factorization.

400432259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366956.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 400432259 is about 20010.8035570789. The cubic root of 400432259 is about 737.0716134761.

It can be divided in two parts, 4004 and 32259, that added together give a palindrome (36263).

The spelling of 400432259 in words is "four hundred million, four hundred thirty-two thousand, two hundred fifty-nine".