400120220004 has 24 divisors (see below), whose sum is σ = 933739355808. Its totient is φ = 133355476800.

The previous prime is 400120219997. The next prime is 400120220033. The reversal of 400120220004 is 400022021004.

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, 2148097 + ... + 2326920.

It is an arithmetic number, because the mean of its divisors is an integer number (38905806492).

Almost surely, 2^400120220004 is an apocalyptic number.

It is an amenable number.

400120220004 is an abundant number, since it is smaller than the sum of its proper divisors (533619135804).

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

400120220004 is a wasteful number, since it uses less digits than its factorization.

400120220004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482475 (or 4482473 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 400120220004 its reverse (400022021004), we get a palindrome (800142241008).

The spelling of 400120220004 in words is "four hundred billion, one hundred twenty million, two hundred twenty thousand, four".