28079772 has 48 divisors (see below), whose sum is σ = 77468160. Its totient is φ = 7745472.

The previous prime is 28079761. The next prime is 28079773. The reversal of 28079772 is 27797082.

It is a Harshad number since it is a multiple of its sum of digits (42).

28079772 is a modest number, since divided by 79772 gives 28 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28079773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3328 + ... + 8199.

It is an arithmetic number, because the mean of its divisors is an integer number (1613920).

Almost surely, 2^28079772 is an apocalyptic number.

It is an amenable number.

28079772 is an abundant number, since it is smaller than the sum of its proper divisors (49388388).

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

28079772 is a wasteful number, since it uses less digits than its factorization.

28079772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11570 (or 11568 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 28079772 is about 5299.0350064894. The cubic root of 28079772 is about 303.9469984930.

The spelling of 28079772 in words is "twenty-eight million, seventy-nine thousand, seven hundred seventy-two".