15278228 has 12 divisors (see below), whose sum is σ = 30556512. Its totient is φ = 6547800.

The previous prime is 15278213. The next prime is 15278231. The reversal of 15278228 is 82287251.

15278228 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272798 + ... + 272853.

It is an arithmetic number, because the mean of its divisors is an integer number (2546376).

Almost surely, 2^15278228 is an apocalyptic number.

It is an amenable number.

15278228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

15278228 is a wasteful number, since it uses less digits than its factorization.

15278228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545662 (or 545660 counting only the distinct ones).

The product of its digits is 17920, while the sum is 35.

The square root of 15278228 is about 3908.7373920487. The cubic root of 15278228 is about 248.1366962320.

The spelling of 15278228 in words is "fifteen million, two hundred seventy-eight thousand, two hundred twenty-eight".