128373556 has 24 divisors (see below), whose sum is σ = 227295936. Its totient is φ = 63436800.

The previous prime is 128373529. The next prime is 128373559. The reversal of 128373556 is 655373821.

128373556 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

128373556 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128373559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154815 + ... + 155641.

It is an arithmetic number, because the mean of its divisors is an integer number (9470664).

Almost surely, 2^128373556 is an apocalyptic number.

It is an amenable number.

128373556 is a deficient number, since it is larger than the sum of its proper divisors (98922380).

128373556 is a wasteful number, since it uses less digits than its factorization.

128373556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239 (or 1237 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 128373556 is about 11330.2054703346. The cubic root of 128373556 is about 504.4582053311.

The spelling of 128373556 in words is "one hundred twenty-eight million, three hundred seventy-three thousand, five hundred fifty-six".