128582613 has 16 divisors (see below), whose sum is σ = 192244800. Its totient is φ = 84933360.

The previous prime is 128582609. The next prime is 128582621. The reversal of 128582613 is 316285821.

It is a happy number.

128582613 is a `hidden beast` number, since 12 + 8 + 582 + 61 + 3 = 666.

It is not a de Polignac number, because 128582613 - 2² = 128582609 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128582413) 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, 18903 + ... + 24788.

It is an arithmetic number, because the mean of its divisors is an integer number (12015300).

Almost surely, 2^128582613 is an apocalyptic number.

It is an amenable number.

128582613 is a deficient number, since it is larger than the sum of its proper divisors (63662187).

128582613 is a wasteful number, since it uses less digits than its factorization.

128582613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43809 (or 43803 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 128582613 is about 11339.4273664943. The cubic root of 128582613 is about 504.7318944158.

The spelling of 128582613 in words is "one hundred twenty-eight million, five hundred eighty-two thousand, six hundred thirteen".