400040399958 has 16 divisors (see below), whose sum is σ = 813641492160. Its totient is φ = 131086684616.

The previous prime is 400040399953. The next prime is 400040399959. The reversal of 400040399958 is 859993040004.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 400040399958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400040399953) 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, 565028460 + ... + 565029167.

It is an arithmetic number, because the mean of its divisors is an integer number (50852593260).

Almost surely, 2^400040399958 is an apocalyptic number.

400040399958 is an abundant number, since it is smaller than the sum of its proper divisors (413601092202).

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

400040399958 is a wasteful number, since it uses less digits than its factorization.

400040399958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130057691.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 400040399958 in words is "four hundred billion, forty million, three hundred ninety-nine thousand, nine hundred fifty-eight".