128790292 has 12 divisors (see below), whose sum is σ = 227104416. Its totient is φ = 63903320.

The previous prime is 128790269. The next prime is 128790301. The reversal of 128790292 is 292097821.

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, 122368 + ... + 123415.

It is an arithmetic number, because the mean of its divisors is an integer number (18925368).

Almost surely, 2^128790292 is an apocalyptic number.

It is an amenable number.

128790292 is a deficient number, since it is larger than the sum of its proper divisors (98314124).

128790292 is a wasteful number, since it uses less digits than its factorization.

128790292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245918 (or 245916 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 128790292 is about 11348.5810566784. The cubic root of 128790292 is about 505.0034859087.

The spelling of 128790292 in words is "one hundred twenty-eight million, seven hundred ninety thousand, two hundred ninety-two".