128925072 has 30 divisors (see below), whose sum is σ = 360811542. Its totient is φ = 42974976.

The previous prime is 128925037. The next prime is 128925073. The reversal of 128925072 is 270529821.

It can be written as a sum of positive squares in only one way, i.e., 107246736 + 21678336 = 10356^2 + 4656^2 .

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

It is not an unprimeable number, because it can be changed into a prime (128925073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 447513 + ... + 447800.

Almost surely, 2^128925072 is an apocalyptic number.

128925072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128925072 is an abundant number, since it is smaller than the sum of its proper divisors (231886470).

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

128925072 is a wasteful number, since it uses less digits than its factorization.

128925072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895327 (or 895318 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 128925072 is about 11354.5176912100. The cubic root of 128925072 is about 505.1795877957.

The spelling of 128925072 in words is "one hundred twenty-eight million, nine hundred twenty-five thousand, seventy-two".