28816949 has 24 divisors (see below), whose sum is σ = 35283456. Its totient is φ = 23436000.

The previous prime is 28816943. The next prime is 28816961. The reversal of 28816949 is 94961882.

It is not a de Polignac number, because 28816949 - 2⁸ = 28816693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28816943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92504 + ... + 92814.

It is an arithmetic number, because the mean of its divisors is an integer number (1470144).

Almost surely, 2^28816949 is an apocalyptic number.

It is an amenable number.

28816949 is a deficient number, since it is larger than the sum of its proper divisors (6466507).

28816949 is a wasteful number, since it uses less digits than its factorization.

28816949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 410 counting only the distinct ones).

The product of its digits is 248832, while the sum is 47.

The square root of 28816949 is about 5368.1420435752. The cubic root of 28816949 is about 306.5838916219.

The spelling of 28816949 in words is "twenty-eight million, eight hundred sixteen thousand, nine hundred forty-nine".