128840572 has 24 divisors (see below), whose sum is σ = 268886016. Its totient is φ = 52816368.

The previous prime is 128840563. The next prime is 128840581. The reversal of 128840572 is 275048821.

It is an interprime number because it is at equal distance from previous prime (128840563) and next prime (128840581).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99388 + ... + 100675.

It is an arithmetic number, because the mean of its divisors is an integer number (11203584).

Almost surely, 2^128840572 is an apocalyptic number.

It is an amenable number.

128840572 is an abundant number, since it is smaller than the sum of its proper divisors (140045444).

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

128840572 is a wasteful number, since it uses less digits than its factorization.

128840572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200097 (or 200095 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 128840572 is about 11350.7960954287. The cubic root of 128840572 is about 505.0691954982.

The spelling of 128840572 in words is "one hundred twenty-eight million, eight hundred forty thousand, five hundred seventy-two".