28398294 has 24 divisors (see below), whose sum is σ = 63515712. Its totient is φ = 9160560.

The previous prime is 28398289. The next prime is 28398323. The reversal of 28398294 is 49289382.

It is a super-2 number, since 2×28398294² = 1612926204220872, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 24889 + ... + 26004.

It is an arithmetic number, because the mean of its divisors is an integer number (2646488).

Almost surely, 2^28398294 is an apocalyptic number.

28398294 is an abundant number, since it is smaller than the sum of its proper divisors (35117418).

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

28398294 is a wasteful number, since it uses less digits than its factorization.

28398294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50932 (or 50929 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 28398294 is about 5329.0049727881. The cubic root of 28398294 is about 305.0919511346.

The spelling of 28398294 in words is "twenty-eight million, three hundred ninety-eight thousand, two hundred ninety-four".