128880434 has 16 divisors (see below), whose sum is σ = 208051416. Its totient is φ = 59654400.

The previous prime is 128880419. The next prime is 128880443. The reversal of 128880434 is 434088821.

It can be written as a sum of positive squares in 4 ways, for example, as 114554209 + 14326225 = 10703^2 + 3785^2 .

It is a super-2 number, since 2×128880434² = 33220332536056712, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28997 + ... + 33144.

Almost surely, 2^128880434 is an apocalyptic number.

128880434 is a deficient number, since it is larger than the sum of its proper divisors (79170982).

128880434 is a wasteful number, since it uses less digits than its factorization.

128880434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62221.

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 128880434 is about 11352.5518717159. The cubic root of 128880434 is about 505.1212779336.

The spelling of 128880434 in words is "one hundred twenty-eight million, eight hundred eighty thousand, four hundred thirty-four".