128257074 has 32 divisors (see below), whose sum is σ = 310927680. Its totient is φ = 38865600.

The previous prime is 128257057. The next prime is 128257079. The reversal of 128257074 is 470752821.

128257074 is a `hidden beast` number, since 1 + 2 + 82 + 570 + 7 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (128257079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107367 + ... + 108554.

It is an arithmetic number, because the mean of its divisors is an integer number (9716490).

Almost surely, 2^128257074 is an apocalyptic number.

128257074 is an abundant number, since it is smaller than the sum of its proper divisors (182670606).

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

128257074 is a wasteful number, since it uses less digits than its factorization.

128257074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215943 (or 215937 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 128257074 is about 11325.0639733292. The cubic root of 128257074 is about 504.3055828237.

The spelling of 128257074 in words is "one hundred twenty-eight million, two hundred fifty-seven thousand, seventy-four".