28816392 has 48 divisors (see below), whose sum is σ = 79193520. Its totient is φ = 8731360.

The previous prime is 28816379. The next prime is 28816397. The reversal of 28816392 is 29361882.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28816392.

It is not an unprimeable number, because it can be changed into a prime (28816397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2058 + ... + 7865.

It is an arithmetic number, because the mean of its divisors is an integer number (1649865).

Almost surely, 2^28816392 is an apocalyptic number.

28816392 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28816392 is an abundant number, since it is smaller than the sum of its proper divisors (50377128).

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

28816392 is a wasteful number, since it uses less digits than its factorization.

28816392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9954 (or 9939 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 28816392 is about 5368.0901631772. The cubic root of 28816392 is about 306.5819162991.

Subtracting 28816392 from its reverse (29361882), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 28816392 in words is "twenty-eight million, eight hundred sixteen thousand, three hundred ninety-two".