128823537 has 8 divisors (see below), whose sum is σ = 171918304. Its totient is φ = 85805568.

The previous prime is 128823509. The next prime is 128823551. The reversal of 128823537 is 735328821.

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

It is not a de Polignac number, because 128823537 - 2⁸ = 128823281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128823495 and 128823504.

It is not an unprimeable number, because it can be changed into a prime (128823557) 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, 15163 + ... + 22080.

It is an arithmetic number, because the mean of its divisors is an integer number (21489788).

Almost surely, 2^128823537 is an apocalyptic number.

It is an amenable number.

128823537 is a deficient number, since it is larger than the sum of its proper divisors (43094767).

128823537 is a wasteful number, since it uses less digits than its factorization.

128823537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38399.

The product of its digits is 80640, while the sum is 39.

The square root of 128823537 is about 11350.0456827274. The cubic root of 128823537 is about 505.0469348267.

The spelling of 128823537 in words is "one hundred twenty-eight million, eight hundred twenty-three thousand, five hundred thirty-seven".