128075772 has 48 divisors (see below), whose sum is σ = 332180352. Its totient is φ = 38076480.

The previous prime is 128075767. The next prime is 128075797. The reversal of 128075772 is 277570821.

It is a self number, because there is not a number n which added to its sum of digits gives 128075772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2158 + ... + 16149.

It is an arithmetic number, because the mean of its divisors is an integer number (6920424).

Almost surely, 2^128075772 is an apocalyptic number.

128075772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128075772 is an abundant number, since it is smaller than the sum of its proper divisors (204104580).

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

128075772 is a wasteful number, since it uses less digits than its factorization.

128075772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18378 (or 18376 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 39.

The square root of 128075772 is about 11317.0566844918. The cubic root of 128075772 is about 504.0678448603.

The spelling of 128075772 in words is "one hundred twenty-eight million, seventy-five thousand, seven hundred seventy-two".