400708977 has 16 divisors (see below), whose sum is σ = 548808960. Its totient is φ = 259970832.

The previous prime is 400708969. The next prime is 400708999. The reversal of 400708977 is 779807004.

It is not a de Polignac number, because 400708977 - 2³ = 400708969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400708907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4674 + ... + 28692.

It is an arithmetic number, because the mean of its divisors is an integer number (34300560).

Almost surely, 2^400708977 is an apocalyptic number.

It is an amenable number.

400708977 is a deficient number, since it is larger than the sum of its proper divisors (148099983).

400708977 is a wasteful number, since it uses less digits than its factorization.

400708977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24172.

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 400708977 is about 20017.7165780715. The cubic root of 400708977 is about 737.2413583904.

The spelling of 400708977 in words is "four hundred million, seven hundred eight thousand, nine hundred seventy-seven".