400664562 has 8 divisors (see below), whose sum is σ = 801329136. Its totient is φ = 133554852.

The previous prime is 400664521. The next prime is 400664567. The reversal of 400664562 is 265466004.

It is a sphenic number, since it is the product of 3 distinct primes.

400664562 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (400664567) 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, 33388708 + ... + 33388719.

It is an arithmetic number, because the mean of its divisors is an integer number (100166142).

Almost surely, 2^400664562 is an apocalyptic number.

400664562 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

400664562 is a wasteful number, since it uses less digits than its factorization.

400664562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66777432.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 400664562 is about 20016.6071550600. The cubic root of 400664562 is about 737.2141185175.

The spelling of 400664562 in words is "four hundred million, six hundred sixty-four thousand, five hundred sixty-two".