400013838507 has 8 divisors (see below), whose sum is σ = 533354733520. Its totient is φ = 266674417920.

The previous prime is 400013838487. The next prime is 400013838517. The reversal of 400013838507 is 705838310004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400013838507 - 2⁶ = 400013838443 is a prime.

It is a super-2 number, since 2×400013838507² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400013838517) 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, 745407 + ... + 1164327.

It is an arithmetic number, because the mean of its divisors is an integer number (66669341690).

Almost surely, 2^400013838507 is an apocalyptic number.

400013838507 is a deficient number, since it is larger than the sum of its proper divisors (133340895013).

400013838507 is a wasteful number, since it uses less digits than its factorization.

400013838507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737213.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 400013838507 in words is "four hundred billion, thirteen million, eight hundred thirty-eight thousand, five hundred seven".