400977772 has 24 divisors (see below), whose sum is σ = 765262400. Its totient is φ = 182722176.

The previous prime is 400977757. The next prime is 400977779. The reversal of 400977772 is 277779004.

It is not an unprimeable number, because it can be changed into a prime (400977779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44697 + ... + 52912.

Almost surely, 2^400977772 is an apocalyptic number.

It is an amenable number.

400977772 is a deficient number, since it is larger than the sum of its proper divisors (364284628).

400977772 is a wasteful number, since it uses less digits than its factorization.

400977772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97705 (or 97703 counting only the distinct ones).

The product of its (nonzero) digits is 172872, while the sum is 43.

The square root of 400977772 is about 20024.4293801347. The cubic root of 400977772 is about 737.4061683554.

The spelling of 400977772 in words is "four hundred million, nine hundred seventy-seven thousand, seven hundred seventy-two".