28913469 has 16 divisors (see below), whose sum is σ = 41950272. Its totient is φ = 17607168.

The previous prime is 28913453. The next prime is 28913471. The reversal of 28913469 is 96431982.

It is not a de Polignac number, because 28913469 - 2⁴ = 28913453 is a prime.

It is a super-2 number, since 2×28913469² = 1671977379227922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28913469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28913419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39 + ... + 7604.

It is an arithmetic number, because the mean of its divisors is an integer number (2621892).

Almost surely, 2^28913469 is an apocalyptic number.

It is an amenable number.

28913469 is a deficient number, since it is larger than the sum of its proper divisors (13036803).

28913469 is a wasteful number, since it uses less digits than its factorization.

28913469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7756.

The product of its digits is 93312, while the sum is 42.

The square root of 28913469 is about 5377.1246033545. The cubic root of 28913469 is about 306.9258026790.

The spelling of 28913469 in words is "twenty-eight million, nine hundred thirteen thousand, four hundred sixty-nine".