400779115 has 16 divisors (see below), whose sum is σ = 528495840. Its totient is φ = 289342720.

The previous prime is 400779053. The next prime is 400779139. The reversal of 400779115 is 511977004.

It is not a de Polignac number, because 400779115 - 2⁹ = 400778603 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 19060 + ... + 34129.

It is an arithmetic number, because the mean of its divisors is an integer number (33030990).

Almost surely, 2^400779115 is an apocalyptic number.

400779115 is a deficient number, since it is larger than the sum of its proper divisors (127716725).

400779115 is a wasteful number, since it uses less digits than its factorization.

400779115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53342.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 400779115 is about 20019.4683995355. The cubic root of 400779115 is about 737.2843701693.

The spelling of 400779115 in words is "four hundred million, seven hundred seventy-nine thousand, one hundred fifteen".