28680751 has 24 divisors (see below), whose sum is σ = 34013952. Its totient is φ = 24076800.

The previous prime is 28680749. The next prime is 28680761. The reversal of 28680751 is 15708682.

It is not a de Polignac number, because 28680751 - 2¹ = 28680749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28680751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28680721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150066 + ... + 150256.

It is an arithmetic number, because the mean of its divisors is an integer number (1417248).

Almost surely, 2^28680751 is an apocalyptic number.

28680751 is a deficient number, since it is larger than the sum of its proper divisors (5333201).

28680751 is a wasteful number, since it uses less digits than its factorization.

28680751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 28680751 is about 5355.4412516617. The cubic root of 28680751 is about 306.1001245821.

The spelling of 28680751 in words is "twenty-eight million, six hundred eighty thousand, seven hundred fifty-one".