128070172 has 12 divisors (see below), whose sum is σ = 230180440. Its totient is φ = 62304336.

The previous prime is 128070169. The next prime is 128070191. The reversal of 128070172 is 271070821.

It is a super-2 number, since 2×128070172² = 32803937912219168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128070172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432522 + ... + 432817.

Almost surely, 2^128070172 is an apocalyptic number.

It is an amenable number.

128070172 is a deficient number, since it is larger than the sum of its proper divisors (102110268).

128070172 is a wasteful number, since it uses less digits than its factorization.

128070172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865380 (or 865378 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 128070172 is about 11316.8092676337. The cubic root of 128070172 is about 504.0604981128.

The spelling of 128070172 in words is "one hundred twenty-eight million, seventy thousand, one hundred seventy-two".