28816434 has 12 divisors (see below), whose sum is σ = 62435646. Its totient is φ = 9605472.

The previous prime is 28816423. The next prime is 28816457. The reversal of 28816434 is 43461882.

28816434 is a `hidden beast` number, since 2 + 8 + 8 + 1 + 643 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27720225 + 1096209 = 5265^2 + 1047^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 800439 + ... + 800474.

Almost surely, 2^28816434 is an apocalyptic number.

28816434 is an abundant number, since it is smaller than the sum of its proper divisors (33619212).

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

28816434 is a wasteful number, since it uses less digits than its factorization.

28816434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600921 (or 1600918 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 28816434 is about 5368.0940751816. The cubic root of 28816434 is about 306.5820652471.

The spelling of 28816434 in words is "twenty-eight million, eight hundred sixteen thousand, four hundred thirty-four".