128738754 has 16 divisors (see below), whose sum is σ = 286086240. Its totient is φ = 42912900.

The previous prime is 128738723. The next prime is 128738759. The reversal of 128738754 is 457837821.

It is not an unprimeable number, because it can be changed into a prime (128738759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1191972 + ... + 1192079.

It is an arithmetic number, because the mean of its divisors is an integer number (17880390).

Almost surely, 2^128738754 is an apocalyptic number.

128738754 is an abundant number, since it is smaller than the sum of its proper divisors (157347486).

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

128738754 is a wasteful number, since it uses less digits than its factorization.

128738754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384062 (or 2384056 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 128738754 is about 11346.3101491190. The cubic root of 128738754 is about 504.9361145208.

The spelling of 128738754 in words is "one hundred twenty-eight million, seven hundred thirty-eight thousand, seven hundred fifty-four".