128927902 has 4 divisors (see below), whose sum is σ = 193391856. Its totient is φ = 64463950.

The previous prime is 128927873. The next prime is 128927923. The reversal of 128927902 is 209729821.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32231974 + ... + 32231977.

It is an arithmetic number, because the mean of its divisors is an integer number (48347964).

Almost surely, 2^128927902 is an apocalyptic number.

128927902 is a deficient number, since it is larger than the sum of its proper divisors (64463954).

128927902 is an equidigital number, since it uses as much as digits as its factorization.

128927902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64463953.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 128927902 is about 11354.6423105266. The cubic root of 128927902 is about 505.1832841229.

The spelling of 128927902 in words is "one hundred twenty-eight million, nine hundred twenty-seven thousand, nine hundred two".