120640536 has 32 divisors (see below), whose sum is σ = 335113200. Its totient is φ = 40213440.

The previous prime is 120640511. The next prime is 120640571. The reversal of 120640536 is 635046021.

120640536 is a `hidden beast` number, since 12 + 0 + 640 + 5 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279045 + ... + 279476.

Almost surely, 2^120640536 is an apocalyptic number.

It is an amenable number.

120640536 is an abundant number, since it is smaller than the sum of its proper divisors (214472664).

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

120640536 is a wasteful number, since it uses less digits than its factorization.

120640536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558536 (or 558526 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 120640536 is about 10983.6485741305. The cubic root of 120640536 is about 494.1184677657.

Adding to 120640536 its reverse (635046021), we get a palindrome (755686557).

The spelling of 120640536 in words is "one hundred twenty million, six hundred forty thousand, five hundred thirty-six".