128901836 has 24 divisors (see below), whose sum is σ = 261655296. Its totient is φ = 54418320.

The previous prime is 128901811. The next prime is 128901847. The reversal of 128901836 is 638109821.

It is a self number, because there is not a number n which added to its sum of digits gives 128901836.

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, 32480 + ... + 36231.

It is an arithmetic number, because the mean of its divisors is an integer number (10902304).

Almost surely, 2^128901836 is an apocalyptic number.

It is an amenable number.

128901836 is an abundant number, since it is smaller than the sum of its proper divisors (132753460).

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

128901836 is a wasteful number, since it uses less digits than its factorization.

128901836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68789 (or 68787 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 128901836 is about 11353.4944400392. The cubic root of 128901836 is about 505.1492366830.

The spelling of 128901836 in words is "one hundred twenty-eight million, nine hundred one thousand, eight hundred thirty-six".