28781296 has 20 divisors (see below), whose sum is σ = 56951712. Its totient is φ = 14084096.

The previous prime is 28781293. The next prime is 28781297. The reversal of 28781296 is 69218782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28781293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18385 + ... + 19888.

Almost surely, 2^28781296 is an apocalyptic number.

It is an amenable number.

28781296 is a deficient number, since it is larger than the sum of its proper divisors (28170416).

28781296 is a wasteful number, since it uses less digits than its factorization.

28781296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38328 (or 38322 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 28781296 is about 5364.8202206598. The cubic root of 28781296 is about 306.4574018668.

The spelling of 28781296 in words is "twenty-eight million, seven hundred eighty-one thousand, two hundred ninety-six".