128644572 has 48 divisors (see below), whose sum is σ = 343768320. Its totient is φ = 36678912.

The previous prime is 128644561. The next prime is 128644583. The reversal of 128644572 is 275446821.

It is an interprime number because it is at equal distance from previous prime (128644561) and next prime (128644583).

It is a self number, because there is not a number n which added to its sum of digits gives 128644572.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48004 + ... + 50612.

It is an arithmetic number, because the mean of its divisors is an integer number (7161840).

Almost surely, 2^128644572 is an apocalyptic number.

128644572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128644572 is an abundant number, since it is smaller than the sum of its proper divisors (215123748).

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

128644572 is a wasteful number, since it uses less digits than its factorization.

128644572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210 (or 3208 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 128644572 is about 11342.1590537252. The cubic root of 128644572 is about 504.8129516729.

The spelling of 128644572 in words is "one hundred twenty-eight million, six hundred forty-four thousand, five hundred seventy-two".