128438074 has 8 divisors (see below), whose sum is σ = 193174740. Its totient is φ = 64046496.

The previous prime is 128438069. The next prime is 128438087. The reversal of 128438074 is 470834821.

It can be written as a sum of positive squares in 2 ways, for example, as 115885225 + 12552849 = 10765^2 + 3543^2 .

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

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, 85339 + ... + 86830.

Almost surely, 2^128438074 is an apocalyptic number.

128438074 is a deficient number, since it is larger than the sum of its proper divisors (64736666).

128438074 is a wasteful number, since it uses less digits than its factorization.

128438074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172544.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 128438074 is about 11333.0522808289. The cubic root of 128438074 is about 504.5427014029.

The spelling of 128438074 in words is "one hundred twenty-eight million, four hundred thirty-eight thousand, seventy-four".