128379292 has 12 divisors (see below), whose sum is σ = 224796600. Its totient is φ = 64151696.

The previous prime is 128379281. The next prime is 128379331. The reversal of 128379292 is 292973821.

It is a super-2 number, since 2×128379292² = 32962485228842528, which contains 22 as substring.

It is a congruent number.

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, 1042 + ... + 16057.

It is an arithmetic number, because the mean of its divisors is an integer number (18733050).

Almost surely, 2^128379292 is an apocalyptic number.

It is an amenable number.

128379292 is a deficient number, since it is larger than the sum of its proper divisors (96417308).

128379292 is a wasteful number, since it uses less digits than its factorization.

128379292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18980 (or 18978 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 128379292 is about 11330.4585961911. The cubic root of 128379292 is about 504.4657186365.

The spelling of 128379292 in words is "one hundred twenty-eight million, three hundred seventy-nine thousand, two hundred ninety-two".