28918370 has 32 divisors (see below), whose sum is σ = 56412720. Its totient is φ = 10609920.

The previous prime is 28918363. The next prime is 28918387. The reversal of 28918370 is 7381982.

It can be written as a sum of positive squares in 8 ways, for example, as 7006609 + 21911761 = 2647^2 + 4681^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22916 + ... + 24144.

Almost surely, 2^28918370 is an apocalyptic number.

28918370 is a deficient number, since it is larger than the sum of its proper divisors (27494350).

28918370 is a wasteful number, since it uses less digits than its factorization.

28918370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 28918370 is about 5377.5803108833. The cubic root of 28918370 is about 306.9431435980.

The spelling of 28918370 in words is "twenty-eight million, nine hundred eighteen thousand, three hundred seventy".