128632698 has 120 divisors (see below), whose sum is σ = 321182400. Its totient is φ = 38362896.

The previous prime is 128632667. The next prime is 128632709. The reversal of 128632698 is 896236821.

128632698 is a `hidden beast` number, since 1 + 2 + 8 + 632 + 6 + 9 + 8 = 666.

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 59 ways as a sum of consecutive naturals, for example, 1628223 + ... + 1628301.

It is an arithmetic number, because the mean of its divisors is an integer number (2676520).

Almost surely, 2^128632698 is an apocalyptic number.

128632698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128632698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160591200).

128632698 is an abundant number, since it is smaller than the sum of its proper divisors (192549702).

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

128632698 is a wasteful number, since it uses less digits than its factorization.

128632698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 126 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 128632698 is about 11341.6355963327. The cubic root of 128632698 is about 504.7974196445.

The spelling of 128632698 in words is "one hundred twenty-eight million, six hundred thirty-two thousand, six hundred ninety-eight".