400536858 has 32 divisors (see below), whose sum is σ = 849624192. Its totient is φ = 125611200.

The previous prime is 400536809. The next prime is 400536859. The reversal of 400536858 is 858635004.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (400536859) 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 15 ways as a sum of consecutive naturals, for example, 15373 + ... + 32208.

It is an arithmetic number, because the mean of its divisors is an integer number (26550756).

Almost surely, 2^400536858 is an apocalyptic number.

400536858 is an abundant number, since it is smaller than the sum of its proper divisors (449087334).

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

400536858 is a wasteful number, since it uses less digits than its factorization.

400536858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47670.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 400536858 is about 20013.4169496366. The cubic root of 400536858 is about 737.1357859963.

The spelling of 400536858 in words is "four hundred million, five hundred thirty-six thousand, eight hundred fifty-eight".