128993274 has 24 divisors (see below), whose sum is σ = 279694272. Its totient is φ = 42965640.

The previous prime is 128993273. The next prime is 128993281. The reversal of 128993274 is 472399821.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128993273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46737 + ... + 49419.

It is an arithmetic number, because the mean of its divisors is an integer number (11653928).

Almost surely, 2^128993274 is an apocalyptic number.

128993274 is an abundant number, since it is smaller than the sum of its proper divisors (150700998).

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

128993274 is a wasteful number, since it uses less digits than its factorization.

128993274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362 (or 5359 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 128993274 is about 11357.5205921011. The cubic root of 128993274 is about 505.2686529248.

The spelling of 128993274 in words is "one hundred twenty-eight million, nine hundred ninety-three thousand, two hundred seventy-four".