128904620 has 24 divisors (see below), whose sum is σ = 291523344. Its totient is φ = 47595456.

The previous prime is 128904617. The next prime is 128904631. The reversal of 128904620 is 26409821.

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, 247634 + ... + 248153.

It is an arithmetic number, because the mean of its divisors is an integer number (12146806).

Almost surely, 2^128904620 is an apocalyptic number.

128904620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128904620 is an abundant number, since it is smaller than the sum of its proper divisors (162618724).

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

128904620 is a wasteful number, since it uses less digits than its factorization.

128904620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495809 (or 495807 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 128904620 is about 11353.6170448012. The cubic root of 128904620 is about 505.1528733660.

The spelling of 128904620 in words is "one hundred twenty-eight million, nine hundred four thousand, six hundred twenty".