28496979 has 54 divisors (see below), whose sum is σ = 50817780. Its totient is φ = 15340752.

The previous prime is 28496939. The next prime is 28496983. The reversal of 28496979 is 97969482.

It is not a de Polignac number, because 28496979 - 2⁸ = 28496723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28496939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 159112 + ... + 159290.

It is an arithmetic number, because the mean of its divisors is an integer number (941070).

Almost surely, 2^28496979 is an apocalyptic number.

28496979 is a deficient number, since it is larger than the sum of its proper divisors (22320801).

28496979 is a wasteful number, since it uses less digits than its factorization.

28496979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 208 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 28496979 is about 5338.2561759436. The cubic root of 28496979 is about 305.4449440637. Note that the first 3 decimals are identical.

The spelling of 28496979 in words is "twenty-eight million, four hundred ninety-six thousand, nine hundred seventy-nine".