400829953138 has 32 divisors (see below), whose sum is σ = 631753940160. Its totient is φ = 190467076800.

The previous prime is 400829953133. The next prime is 400829953177. The reversal of 400829953138 is 831359928004.

It is a super-2 number, since 2×400829953138² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400829953133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5016045 + ... + 5095327.

It is an arithmetic number, because the mean of its divisors is an integer number (19742310630).

Almost surely, 2^400829953138 is an apocalyptic number.

400829953138 is a deficient number, since it is larger than the sum of its proper divisors (230923987022).

400829953138 is a wasteful number, since it uses less digits than its factorization.

400829953138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80682.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 400829953138 in words is "four hundred billion, eight hundred twenty-nine million, nine hundred fifty-three thousand, one hundred thirty-eight".