400444266 has 64 divisors (see below), whose sum is σ = 873331200. Its totient is φ = 121974336.

The previous prime is 400444249. The next prime is 400444273. The reversal of 400444266 is 662444004.

It is a super-2 number, since 2×400444266² = 320711220344557512, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 585961 + ... + 586643.

It is an arithmetic number, because the mean of its divisors is an integer number (13645800).

Almost surely, 2^400444266 is an apocalyptic number.

400444266 is an abundant number, since it is smaller than the sum of its proper divisors (472886934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400444266 is a wasteful number, since it uses less digits than its factorization.

400444266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883.

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 400444266 is about 20011.1035677696. The cubic root of 400444266 is about 737.0789804570.

The spelling of 400444266 in words is "four hundred million, four hundred forty-four thousand, two hundred sixty-six".