28436784 has 40 divisors (see below), whose sum is σ = 77785200. Its totient is φ = 8921088.

The previous prime is 28436777. The next prime is 28436819. The reversal of 28436784 is 48763482.

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, 16609 + ... + 18240.

It is an arithmetic number, because the mean of its divisors is an integer number (1944630).

Almost surely, 2^28436784 is an apocalyptic number.

28436784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28436784 is an abundant number, since it is smaller than the sum of its proper divisors (49348416).

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

28436784 is a wasteful number, since it uses less digits than its factorization.

28436784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34877 (or 34871 counting only the distinct ones).

The product of its digits is 258048, while the sum is 42.

The square root of 28436784 is about 5332.6151183073. The cubic root of 28436784 is about 305.2297257001.

The spelling of 28436784 in words is "twenty-eight million, four hundred thirty-six thousand, seven hundred eighty-four".