120400431632 has 40 divisors (see below), whose sum is σ = 252535503360. Its totient is φ = 55278472320.

The previous prime is 120400431607. The next prime is 120400431649. The reversal of 120400431632 is 236134004021.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475582 + ... + 1555037.

It is an arithmetic number, because the mean of its divisors is an integer number (6313387584).

Almost surely, 2^120400431632 is an apocalyptic number.

It is an amenable number.

120400431632 is an abundant number, since it is smaller than the sum of its proper divisors (132135071728).

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

120400431632 is a wasteful number, since it uses less digits than its factorization.

120400431632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030831 (or 3030825 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 120400431632 its reverse (236134004021), we get a palindrome (356534435653).

The spelling of 120400431632 in words is "one hundred twenty billion, four hundred million, four hundred thirty-one thousand, six hundred thirty-two".