128981164 has 24 divisors (see below), whose sum is σ = 246714608. Its totient is φ = 58639680.

The previous prime is 128981147. The next prime is 128981179. The reversal of 128981164 is 461189821.

It is a super-2 number, since 2×128981164² = 33272281333589792, which contains 22 as substring.

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, 15027 + ... + 21994.

Almost surely, 2^128981164 is an apocalyptic number.

It is an amenable number.

128981164 is a deficient number, since it is larger than the sum of its proper divisors (117733444).

128981164 is a wasteful number, since it uses less digits than its factorization.

128981164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37105 (or 37103 counting only the distinct ones).

The product of its digits is 27648, while the sum is 40.

The square root of 128981164 is about 11356.9874526654. The cubic root of 128981164 is about 505.2528407440.

The spelling of 128981164 in words is "one hundred twenty-eight million, nine hundred eighty-one thousand, one hundred sixty-four".