128373557 has 32 divisors (see below), whose sum is σ = 154828800. Its totient is φ = 105285312.

The previous prime is 128373529. The next prime is 128373559. The reversal of 128373557 is 755373821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128373557 is a prime.

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 334988 + ... + 335370.

It is an arithmetic number, because the mean of its divisors is an integer number (4838400).

Almost surely, 2^128373557 is an apocalyptic number.

It is an amenable number.

128373557 is a deficient number, since it is larger than the sum of its proper divisors (26455243).

128373557 is a wasteful number, since it uses less digits than its factorization.

128373557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497.

The product of its digits is 176400, while the sum is 41.

The square root of 128373557 is about 11330.2055144644. The cubic root of 128373557 is about 504.4582066410.

The spelling of 128373557 in words is "one hundred twenty-eight million, three hundred seventy-three thousand, five hundred fifty-seven".