400581772 has 12 divisors (see below), whose sum is σ = 701340640. Its totient is φ = 200198736.

The previous prime is 400581743. The next prime is 400581809. The reversal of 400581772 is 277185004.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12747 + ... + 31042.

Almost surely, 2^400581772 is an apocalyptic number.

It is an amenable number.

400581772 is a deficient number, since it is larger than the sum of its proper divisors (300758868).

400581772 is a wasteful number, since it uses less digits than its factorization.

400581772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46080 (or 46078 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 400581772 is about 20014.5390154258. The cubic root of 400581772 is about 737.1633377505.

The spelling of 400581772 in words is "four hundred million, five hundred eighty-one thousand, seven hundred seventy-two".