128972574 has 40 divisors (see below), whose sum is σ = 306000288. Its totient is φ = 40461120.

The previous prime is 128972567. The next prime is 128972579. The reversal of 128972574 is 475279821.

It is a happy number.

128972574 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 72 + 574 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128972579) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20662 + ... + 26169.

Almost surely, 2^128972574 is an apocalyptic number.

128972574 is an abundant number, since it is smaller than the sum of its proper divisors (177027714).

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

128972574 is a wasteful number, since it uses less digits than its factorization.

128972574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46862 (or 46853 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 128972574 is about 11356.6092650932. The cubic root of 128972574 is about 505.2416240720.

The spelling of 128972574 in words is "one hundred twenty-eight million, nine hundred seventy-two thousand, five hundred seventy-four".