28923769 has 12 divisors (see below), whose sum is σ = 33809664. Its totient is φ = 24671304.

The previous prime is 28923709. The next prime is 28923779. The reversal of 28923769 is 96732982.

It is a de Polignac number, because none of the positive numbers 2^k-28923769 is a prime.

It is a super-2 number, since 2×28923769² = 1673168826330722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28923709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9604 + ... + 12250.

It is an arithmetic number, because the mean of its divisors is an integer number (2817472).

Almost surely, 2^28923769 is an apocalyptic number.

It is an amenable number.

28923769 is a deficient number, since it is larger than the sum of its proper divisors (4885895).

28923769 is a wasteful number, since it uses less digits than its factorization.

28923769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884 (or 2877 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 28923769 is about 5378.0822790285. The cubic root of 28923769 is about 306.9622442932.

It can be divided in two parts, 28923 and 769, that added together give a palindrome (29692).

The spelling of 28923769 in words is "twenty-eight million, nine hundred twenty-three thousand, seven hundred sixty-nine".