28916769 has 32 divisors (see below), whose sum is σ = 46587904. Its totient is φ = 15603840.

The previous prime is 28916761. The next prime is 28916801. The reversal of 28916769 is 96761982.

It is not a de Polignac number, because 28916769 - 2³ = 28916761 is a prime.

It is a super-2 number, since 2×28916769² = 1672359058798722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28916761) 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, 27477 + ... + 28509.

It is an arithmetic number, because the mean of its divisors is an integer number (1455872).

Almost surely, 2^28916769 is an apocalyptic number.

It is an amenable number.

28916769 is a deficient number, since it is larger than the sum of its proper divisors (17671135).

28916769 is a wasteful number, since it uses less digits than its factorization.

28916769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117.

The product of its digits is 326592, while the sum is 48.

The square root of 28916769 is about 5377.4314500512. The cubic root of 28916769 is about 306.9374790897.

The spelling of 28916769 in words is "twenty-eight million, nine hundred sixteen thousand, seven hundred sixty-nine".