28719776 has 24 divisors (see below), whose sum is σ = 57472884. Its totient is φ = 14123520.

The previous prime is 28719731. The next prime is 28719781. The reversal of 28719776 is 67791782.

It can be written as a sum of positive squares in 2 ways, for example, as 27836176 + 883600 = 5276^2 + 940^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28719776.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5405 + ... + 9308.

Almost surely, 2^28719776 is an apocalyptic number.

It is an amenable number.

28719776 is an abundant number, since it is smaller than the sum of its proper divisors (28753108).

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

28719776 is a wasteful number, since it uses less digits than its factorization.

28719776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14784 (or 14776 counting only the distinct ones).

The product of its digits is 296352, while the sum is 47.

The square root of 28719776 is about 5359.0835037346. The cubic root of 28719776 is about 306.2388952797.

The spelling of 28719776 in words is "twenty-eight million, seven hundred nineteen thousand, seven hundred seventy-six".