128633970 has 32 divisors (see below), whose sum is σ = 313334208. Its totient is φ = 33789888.

The previous prime is 128633969. The next prime is 128633993. The reversal of 128633970 is 79336821.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29989 + ... + 34008.

It is an arithmetic number, because the mean of its divisors is an integer number (9791694).

Almost surely, 2^128633970 is an apocalyptic number.

128633970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128633970 is an abundant number, since it is smaller than the sum of its proper divisors (184700238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128633970 is a wasteful number, since it uses less digits than its factorization.

128633970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64074.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 128633970 is about 11341.6916727620. The cubic root of 128633970 is about 504.7990835558.

The spelling of 128633970 in words is "one hundred twenty-eight million, six hundred thirty-three thousand, nine hundred seventy".