128699634 has 32 divisors (see below), whose sum is σ = 297722880. Its totient is φ = 36327312.

The previous prime is 128699609. The next prime is 128699671. The reversal of 128699634 is 436996821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14974 + ... + 21945.

It is an arithmetic number, because the mean of its divisors is an integer number (9303840).

Almost surely, 2^128699634 is an apocalyptic number.

128699634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

128699634 is an abundant number, since it is smaller than the sum of its proper divisors (169023246).

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

128699634 is a wasteful number, since it uses less digits than its factorization.

128699634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37014.

The product of its digits is 559872, while the sum is 48.

The square root of 128699634 is about 11344.5861096825. The cubic root of 128699634 is about 504.8849641580.

The spelling of 128699634 in words is "one hundred twenty-eight million, six hundred ninety-nine thousand, six hundred thirty-four".