400440969 has 16 divisors (see below), whose sum is σ = 593611200. Its totient is φ = 266796288.

The previous prime is 400440949. The next prime is 400440991. The reversal of 400440969 is 969044004.

It is not a de Polignac number, because 400440969 - 2¹¹ = 400438921 is a prime.

It is a super-2 number, since 2×400440969² = 320705939307317922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400440949) 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, 53542 + ... + 60560.

It is an arithmetic number, because the mean of its divisors is an integer number (37100700).

Almost surely, 2^400440969 is an apocalyptic number.

It is an amenable number.

400440969 is a deficient number, since it is larger than the sum of its proper divisors (193170231).

400440969 is a wasteful number, since it uses less digits than its factorization.

400440969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9141 (or 9135 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 400440969 is about 20011.0211883352. The cubic root of 400440969 is about 737.0769575737.

The spelling of 400440969 in words is "four hundred million, four hundred forty thousand, nine hundred sixty-nine".