400755864 has 32 divisors (see below), whose sum is σ = 1045451520. Its totient is φ = 127777056.

The previous prime is 400755863. The next prime is 400755871. The reversal of 400755864 is 468557004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400755863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362452 + ... + 363555.

It is an arithmetic number, because the mean of its divisors is an integer number (32670360).

Almost surely, 2^400755864 is an apocalyptic number.

It is an amenable number.

400755864 is an abundant number, since it is smaller than the sum of its proper divisors (644695656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400755864 is a wasteful number, since it uses less digits than its factorization.

400755864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726039 (or 726035 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 400755864 is about 20018.8876813873. The cubic root of 400755864 is about 737.2701121655.

The spelling of 400755864 in words is "four hundred million, seven hundred fifty-five thousand, eight hundred sixty-four".