28784376 has 32 divisors (see below), whose sum is σ = 79957200. Its totient is φ = 9594720.

The previous prime is 28784369. The next prime is 28784381. The reversal of 28784376 is 67348782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66415 + ... + 66846.

Almost surely, 2^28784376 is an apocalyptic number.

It is an amenable number.

28784376 is an abundant number, since it is smaller than the sum of its proper divisors (51172824).

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

28784376 is a wasteful number, since it uses less digits than its factorization.

28784376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133276 (or 133266 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 28784376 is about 5365.1072682659. The cubic root of 28784376 is about 306.4683332152.

The spelling of 28784376 in words is "twenty-eight million, seven hundred eighty-four thousand, three hundred seventy-six".