128627634 has 8 divisors (see below), whose sum is σ = 257255280. Its totient is φ = 42875876.

The previous prime is 128627623. The next prime is 128627657. The reversal of 128627634 is 436726821.

It is a happy number.

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

128627634 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 128627592 and 128627601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10718964 + ... + 10718975.

It is an arithmetic number, because the mean of its divisors is an integer number (32156910).

Almost surely, 2^128627634 is an apocalyptic number.

128627634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128627634 is a wasteful number, since it uses less digits than its factorization.

128627634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21437944.

The product of its digits is 96768, while the sum is 39.

The square root of 128627634 is about 11341.4123459118. The cubic root of 128627634 is about 504.7907952851.

It can be divided in two parts, 1286 and 27634, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 128627634 in words is "one hundred twenty-eight million, six hundred twenty-seven thousand, six hundred thirty-four".