28499784 has 32 divisors (see below), whose sum is σ = 72229920. Its totient is φ = 9369216.

The previous prime is 28499777. The next prime is 28499831. The reversal of 28499784 is 48799482.

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, 6382 + ... + 9885.

It is an arithmetic number, because the mean of its divisors is an integer number (2257185).

Almost surely, 2^28499784 is an apocalyptic number.

28499784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28499784 is an abundant number, since it is smaller than the sum of its proper divisors (43730136).

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

28499784 is a wasteful number, since it uses less digits than its factorization.

28499784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16349 (or 16345 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 28499784 is about 5338.5188957238. The cubic root of 28499784 is about 305.4549655349.

The spelling of 28499784 in words is "twenty-eight million, four hundred ninety-nine thousand, seven hundred eighty-four".