128641794 has 16 divisors (see below), whose sum is σ = 257635200. Its totient is φ = 42822000.

The previous prime is 128641789. The next prime is 128641811. The reversal of 128641794 is 497146821.

It is a super-2 number, since 2×128641794² = 33097422327076872, which contains 22 as substring.

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, 9769 + ... + 18780.

It is an arithmetic number, because the mean of its divisors is an integer number (16102200).

Almost surely, 2^128641794 is an apocalyptic number.

128641794 is an abundant number, since it is smaller than the sum of its proper divisors (128993406).

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

128641794 is a wasteful number, since it uses less digits than its factorization.

128641794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29305.

The product of its digits is 96768, while the sum is 42.

The square root of 128641794 is about 11342.0365896077. The cubic root of 128641794 is about 504.8093179389.

The spelling of 128641794 in words is "one hundred twenty-eight million, six hundred forty-one thousand, seven hundred ninety-four".