28969525 has 12 divisors (see below), whose sum is σ = 38685892. Its totient is φ = 21392640.

The previous prime is 28969517. The next prime is 28969541. The reversal of 28969525 is 52596982.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 164836 + 28804689 = 406^2 + 5367^2 .

It is not a de Polignac number, because 28969525 - 2³ = 28969517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44244 + ... + 44893.

Almost surely, 2^28969525 is an apocalyptic number.

28969525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28969525 is a deficient number, since it is larger than the sum of its proper divisors (9716367).

28969525 is a wasteful number, since it uses less digits than its factorization.

28969525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89160 (or 89155 counting only the distinct ones).

The product of its digits is 388800, while the sum is 46.

The square root of 28969525 is about 5382.3345306660. The cubic root of 28969525 is about 307.1240254750.

It can be divided in two parts, 2896 and 9525, that added together give a palindrome (12421).

The spelling of 28969525 in words is "twenty-eight million, nine hundred sixty-nine thousand, five hundred twenty-five".