128896537 has 8 divisors (see below), whose sum is σ = 160702272. Its totient is φ = 100438800.

The previous prime is 128896517. The next prime is 128896553. The reversal of 128896537 is 735698821.

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

It is a de Polignac number, because none of the positive numbers 2^k-128896537 is a prime.

It is a super-2 number, since 2×128896537² = 33228634501184738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128896517) 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, 836914 + ... + 837067.

It is an arithmetic number, because the mean of its divisors is an integer number (20087784).

Almost surely, 2^128896537 is an apocalyptic number.

It is an amenable number.

128896537 is a deficient number, since it is larger than the sum of its proper divisors (31805735).

128896537 is a wasteful number, since it uses less digits than its factorization.

128896537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673999.

The product of its digits is 725760, while the sum is 49.

The square root of 128896537 is about 11353.2610733657. The cubic root of 128896537 is about 505.1423145615.

The spelling of 128896537 in words is "one hundred twenty-eight million, eight hundred ninety-six thousand, five hundred thirty-seven".