400755685 has 16 divisors (see below), whose sum is σ = 525148992. Its totient is φ = 291168000.

The previous prime is 400755659. The next prime is 400755763. The reversal of 400755685 is 586557004.

It is not a de Polignac number, because 400755685 - 2¹⁷ = 400624613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63022 + ... + 69088.

It is an arithmetic number, because the mean of its divisors is an integer number (32821812).

Almost surely, 2^400755685 is an apocalyptic number.

It is an amenable number.

400755685 is a deficient number, since it is larger than the sum of its proper divisors (124393307).

400755685 is a wasteful number, since it uses less digits than its factorization.

400755685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7284.

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 400755685 is about 20018.8832106089. The cubic root of 400755685 is about 737.2700023968.

The spelling of 400755685 in words is "four hundred million, seven hundred fifty-five thousand, six hundred eighty-five".