128900270 has 8 divisors (see below), whose sum is σ = 232020504. Its totient is φ = 51560104.

The previous prime is 128900251. The next prime is 128900323. The reversal of 128900270 is 72009821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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, 6445004 + ... + 6445023.

It is an arithmetic number, because the mean of its divisors is an integer number (29002563).

Almost surely, 2^128900270 is an apocalyptic number.

128900270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128900270 is a deficient number, since it is larger than the sum of its proper divisors (103120234).

128900270 is a wasteful number, since it uses less digits than its factorization.

128900270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12890034.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 128900270 is about 11353.4254742787. The cubic root of 128900270 is about 505.1471910258.

The spelling of 128900270 in words is "one hundred twenty-eight million, nine hundred thousand, two hundred seventy".