400071439992 has 32 divisors (see below), whose sum is σ = 1143061257600. Its totient is φ = 114306125664.

The previous prime is 400071439981. The next prime is 400071440009. The reversal of 400071439992 is 299934170004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190688642 + ... + 1190688977.

It is an arithmetic number, because the mean of its divisors is an integer number (35720664300).

Almost surely, 2^400071439992 is an apocalyptic number.

400071439992 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

400071439992 is an abundant number, since it is smaller than the sum of its proper divisors (742989817608).

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

400071439992 is a wasteful number, since it uses less digits than its factorization.

400071439992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381377635 (or 2381377631 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 400071439992 in words is "four hundred billion, seventy-one million, four hundred thirty-nine thousand, nine hundred ninety-two".