128790072 has 48 divisors (see below), whose sum is σ = 349617840. Its totient is φ = 42830208.

The previous prime is 128790047. The next prime is 128790107. The reversal of 128790072 is 270097821.

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

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, 33228 + ... + 36900.

It is an arithmetic number, because the mean of its divisors is an integer number (7283705).

Almost surely, 2^128790072 is an apocalyptic number.

128790072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128790072 is an abundant number, since it is smaller than the sum of its proper divisors (220827768).

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

128790072 is a wasteful number, since it uses less digits than its factorization.

128790072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4172 (or 4165 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 128790072 is about 11348.5713638325. The cubic root of 128790072 is about 505.0031983590.

The spelling of 128790072 in words is "one hundred twenty-eight million, seven hundred ninety thousand, seventy-two".