120388644 has 36 divisors (see below), whose sum is σ = 305061120. Its totient is φ = 40031280.

The previous prime is 120388643. The next prime is 120388651. The reversal of 120388644 is 446883021.

120388644 is a `hidden beast` number, since 1 + 2 + 0 + 3 + 8 + 8 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 120388599 and 120388608.

It is not an unprimeable number, because it can be changed into a prime (120388643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11637 + ... + 19395.

It is an arithmetic number, because the mean of its divisors is an integer number (8473920).

Almost surely, 2^120388644 is an apocalyptic number.

It is an amenable number.

120388644 is an abundant number, since it is smaller than the sum of its proper divisors (184672476).

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

120388644 is a wasteful number, since it uses less digits than its factorization.

120388644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8200 (or 8195 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 120388644 is about 10972.1759008868. The cubic root of 120388644 is about 493.7743291115.

The spelling of 120388644 in words is "one hundred twenty million, three hundred eighty-eight thousand, six hundred forty-four".