120640436 has 24 divisors (see below), whose sum is σ = 242516736. Its totient is φ = 51438240.

The previous prime is 120640411. The next prime is 120640441. The reversal of 120640436 is 634046021.

It is a super-2 number, since 2×120640436² = 29108229596540192, which contains 22 as substring.

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, 5420 + ... + 16451.

It is an arithmetic number, because the mean of its divisors is an integer number (10104864).

Almost surely, 2^120640436 is an apocalyptic number.

It is an amenable number.

120640436 is an abundant number, since it is smaller than the sum of its proper divisors (121876300).

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

120640436 is a wasteful number, since it uses less digits than its factorization.

120640436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22079 (or 22077 counting only the distinct ones).

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

The square root of 120640436 is about 10983.6440219082. The cubic root of 120640436 is about 494.1183312393.

Adding to 120640436 its reverse (634046021), we get a palindrome (754686457).

The spelling of 120640436 in words is "one hundred twenty million, six hundred forty thousand, four hundred thirty-six".