128906902 has 8 divisors (see below), whose sum is σ = 193563216. Its totient is φ = 64385832.

The previous prime is 128906879. The next prime is 128906909. The reversal of 128906902 is 209609821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128906909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31393 + ... + 35260.

It is an arithmetic number, because the mean of its divisors is an integer number (24195402).

Almost surely, 2^128906902 is an apocalyptic number.

128906902 is a deficient number, since it is larger than the sum of its proper divisors (64656314).

128906902 is an equidigital number, since it uses as much as digits as its factorization.

128906902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67622.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 128906902 is about 11353.7175409643. The cubic root of 128906902 is about 505.1558542575.

The spelling of 128906902 in words is "one hundred twenty-eight million, nine hundred six thousand, nine hundred two".