400064522 has 32 divisors (see below), whose sum is σ = 711305280. Its totient is φ = 166360320.

The previous prime is 400064521. The next prime is 400064527. The reversal of 400064522 is 225460004.

It is not an unprimeable number, because it can be changed into a prime (400064521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26129 + ... + 38507.

It is an arithmetic number, because the mean of its divisors is an integer number (22228290).

Almost surely, 2^400064522 is an apocalyptic number.

400064522 is a deficient number, since it is larger than the sum of its proper divisors (311240758).

400064522 is a wasteful number, since it uses less digits than its factorization.

400064522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12518.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 400064522 is about 20001.6129849570. The cubic root of 400064522 is about 736.8459144449.

The spelling of 400064522 in words is "four hundred million, sixty-four thousand, five hundred twenty-two".