28731792 has 40 divisors (see below), whose sum is σ = 76622080. Its totient is φ = 9267840.

The previous prime is 28731763. The next prime is 28731797. The reversal of 28731792 is 29713782.

It is a self number, because there is not a number n which added to its sum of digits gives 28731792.

It is not an unprimeable number, because it can be changed into a prime (28731797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8167 + ... + 11142.

It is an arithmetic number, because the mean of its divisors is an integer number (1915552).

Almost surely, 2^28731792 is an apocalyptic number.

It is an amenable number.

28731792 is an abundant number, since it is smaller than the sum of its proper divisors (47890288).

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

28731792 is a wasteful number, since it uses less digits than its factorization.

28731792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19351 (or 19345 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 28731792 is about 5360.2044737118. The cubic root of 28731792 is about 306.2815981835.

The spelling of 28731792 in words is "twenty-eight million, seven hundred thirty-one thousand, seven hundred ninety-two".