28160769 has 32 divisors (see below), whose sum is σ = 47819520. Its totient is φ = 14337792.

The previous prime is 28160753. The next prime is 28160779. The reversal of 28160769 is 96706182.

It is not a de Polignac number, because 28160769 - 2⁴ = 28160753 is a prime.

It is a super-2 number, since 2×28160769² = 1586057821342722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (28160729) 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, 6139 + ... + 9695.

It is an arithmetic number, because the mean of its divisors is an integer number (1494360).

Almost surely, 2^28160769 is an apocalyptic number.

28160769 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28160769 is a deficient number, since it is larger than the sum of its proper divisors (19658751).

28160769 is a wasteful number, since it uses less digits than its factorization.

28160769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 28160769 is about 5306.6721210190. The cubic root of 28160769 is about 304.2389662206.

The spelling of 28160769 in words is "twenty-eight million, one hundred sixty thousand, seven hundred sixty-nine".