128983557 has 8 divisors (see below), whose sum is σ = 175637376. Its totient is φ = 84159392.

The previous prime is 128983549. The next prime is 128983579. The reversal of 128983557 is 755389821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128983557 - 2³ = 128983549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128983957) 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, 457248 + ... + 457529.

It is an arithmetic number, because the mean of its divisors is an integer number (21954672).

Almost surely, 2^128983557 is an apocalyptic number.

It is an amenable number.

128983557 is a deficient number, since it is larger than the sum of its proper divisors (46653819).

128983557 is an equidigital number, since it uses as much as digits as its factorization.

128983557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914827.

The product of its digits is 604800, while the sum is 48.

The square root of 128983557 is about 11357.0928058196. The cubic root of 128983557 is about 505.2559653930.

The spelling of 128983557 in words is "one hundred twenty-eight million, nine hundred eighty-three thousand, five hundred fifty-seven".