28753308 has 72 divisors (see below), whose sum is σ = 77342720. Its totient is φ = 8981280.

The previous prime is 28753279. The next prime is 28753339. The reversal of 28753308 is 80335782.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86703 + ... + 87033.

Almost surely, 2^28753308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28753308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38671360).

28753308 is an abundant number, since it is smaller than the sum of its proper divisors (48589412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28753308 is a wasteful number, since it uses less digits than its factorization.

28753308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 28753308 is about 5362.2111110996. The cubic root of 28753308 is about 306.3580328007.

The spelling of 28753308 in words is "twenty-eight million, seven hundred fifty-three thousand, three hundred eight".