28749508 has 12 divisors (see below), whose sum is σ = 52959760. Its totient is φ = 13618152.

The previous prime is 28749503. The next prime is 28749521. The reversal of 28749508 is 80594782.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (28749503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189066 + ... + 189217.

Almost surely, 2^28749508 is an apocalyptic number.

It is an amenable number.

28749508 is a deficient number, since it is larger than the sum of its proper divisors (24210252).

28749508 is a wasteful number, since it uses less digits than its factorization.

28749508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378306 (or 378304 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 28749508 is about 5361.8567679490. The cubic root of 28749508 is about 306.3445362457.

The spelling of 28749508 in words is "twenty-eight million, seven hundred forty-nine thousand, five hundred eight".