400644462 has 16 divisors (see below), whose sum is σ = 814425552. Its totient is φ = 131358720.

The previous prime is 400644451. The next prime is 400644481. The reversal of 400644462 is 264446004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546963 + ... + 547694.

It is an arithmetic number, because the mean of its divisors is an integer number (50901597).

Almost surely, 2^400644462 is an apocalyptic number.

400644462 is an abundant number, since it is smaller than the sum of its proper divisors (413781090).

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

400644462 is a wasteful number, since it uses less digits than its factorization.

400644462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094723.

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

The square root of 400644462 is about 20016.1050656715. The cubic root of 400644462 is about 737.2017904564.

The spelling of 400644462 in words is "four hundred million, six hundred forty-four thousand, four hundred sixty-two".