120644406 has 24 divisors (see below), whose sum is σ = 263156400. Its totient is φ = 39944016.

The previous prime is 120644351. The next prime is 120644411. The reversal of 120644406 is 604446021.

120644406 is a `hidden beast` number, since 12 + 0 + 644 + 4 + 0 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 120644406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19810 + ... + 25173.

It is an arithmetic number, because the mean of its divisors is an integer number (10964850).

Almost surely, 2^120644406 is an apocalyptic number.

120644406 is an abundant number, since it is smaller than the sum of its proper divisors (142511994).

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

120644406 is a wasteful number, since it uses less digits than its factorization.

120644406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45140 (or 45137 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 120644406 is about 10983.8247436856. The cubic root of 120644406 is about 494.1237512801.

The spelling of 120644406 in words is "one hundred twenty million, six hundred forty-four thousand, four hundred six".