128892775 has 24 divisors (see below), whose sum is σ = 176488704. Its totient is φ = 92594400.

The previous prime is 128892763. The next prime is 128892779. The reversal of 128892775 is 577298821.

It is not a de Polignac number, because 128892775 - 2²⁵ = 95338343 is a prime.

It is a super-2 number, since 2×128892775² = 33226694894401250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128892779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20002 + ... + 25648.

It is an arithmetic number, because the mean of its divisors is an integer number (7353696).

Almost surely, 2^128892775 is an apocalyptic number.

128892775 is a deficient number, since it is larger than the sum of its proper divisors (47595929).

128892775 is a wasteful number, since it uses less digits than its factorization.

128892775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751 (or 5746 counting only the distinct ones).

The product of its digits is 564480, while the sum is 49.

The square root of 128892775 is about 11353.0953928874. The cubic root of 128892775 is about 505.1374001190.

The spelling of 128892775 in words is "one hundred twenty-eight million, eight hundred ninety-two thousand, seven hundred seventy-five".