28969375 has 10 divisors (see below), whose sum is σ = 36200912. Its totient is φ = 23175000.

The previous prime is 28969373. The next prime is 28969387. The reversal of 28969375 is 57396982.

It is not a de Polignac number, because 28969375 - 2¹ = 28969373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28969373) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 22551 + ... + 23800.

Almost surely, 2^28969375 is an apocalyptic number.

28969375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28969375 is a deficient number, since it is larger than the sum of its proper divisors (7231537).

28969375 is an frugal number, since it uses more digits than its factorization.

28969375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46371 (or 46356 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The square root of 28969375 is about 5382.3205961741. The cubic root of 28969375 is about 307.1234953929.

The spelling of 28969375 in words is "twenty-eight million, nine hundred sixty-nine thousand, three hundred seventy-five".