120780128 has 48 divisors (see below), whose sum is σ = 281141280. Its totient is φ = 49975296.

The previous prime is 120780119. The next prime is 120780151. The reversal of 120780128 is 821087021.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 120780128.

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, 2801 + ... + 15792.

It is an arithmetic number, because the mean of its divisors is an integer number (5857110).

Almost surely, 2^120780128 is an apocalyptic number.

It is an amenable number.

120780128 is an abundant number, since it is smaller than the sum of its proper divisors (160361152).

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

120780128 is a wasteful number, since it uses less digits than its factorization.

120780128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18639 (or 18631 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 120780128 is about 10990.0012738853. The cubic root of 120780128 is about 494.3089742105.

The spelling of 120780128 in words is "one hundred twenty million, seven hundred eighty thousand, one hundred twenty-eight".