28816437 has 16 divisors (see below), whose sum is σ = 41626368. Its totient is φ = 17626560.

The previous prime is 28816423. The next prime is 28816457. The reversal of 28816437 is 73461882.

It is not a de Polignac number, because 28816437 - 2⁴ = 28816421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 28816395 and 28816404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28816457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4612 + ... + 8882.

It is an arithmetic number, because the mean of its divisors is an integer number (2601648).

Almost surely, 2^28816437 is an apocalyptic number.

It is an amenable number.

28816437 is a deficient number, since it is larger than the sum of its proper divisors (12809931).

28816437 is a wasteful number, since it uses less digits than its factorization.

28816437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4460.

The product of its digits is 64512, while the sum is 39.

The square root of 28816437 is about 5368.0943546104. The cubic root of 28816437 is about 306.5820758863.

The spelling of 28816437 in words is "twenty-eight million, eight hundred sixteen thousand, four hundred thirty-seven".