128973156 has 48 divisors (see below), whose sum is σ = 325262784. Its totient is φ = 39540096.

The previous prime is 128973127. The next prime is 128973161. The reversal of 128973156 is 651379821.

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, 46546 + ... + 49238.

It is an arithmetic number, because the mean of its divisors is an integer number (6776308).

Almost surely, 2^128973156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128973156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162631392).

128973156 is an abundant number, since it is smaller than the sum of its proper divisors (196289628).

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

128973156 is a wasteful number, since it uses less digits than its factorization.

128973156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020 (or 3018 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 128973156 is about 11356.6348889097. The cubic root of 128973156 is about 505.2423840532.

The spelling of 128973156 in words is "one hundred twenty-eight million, nine hundred seventy-three thousand, one hundred fifty-six".