15091228 has 12 divisors (see below), whose sum is σ = 26437320. Its totient is φ = 7537712.

The previous prime is 15091213. The next prime is 15091229. The reversal of 15091228 is 82219051.

It is a junction number, because it is equal to n+sod(n) for n = 15091196 and 15091205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15091229) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5283 + ... + 7621.

It is an arithmetic number, because the mean of its divisors is an integer number (2203110).

Almost surely, 2^15091228 is an apocalyptic number.

It is an amenable number.

15091228 is a deficient number, since it is larger than the sum of its proper divisors (11346092).

15091228 is a wasteful number, since it uses less digits than its factorization.

15091228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956 (or 3954 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 15091228 is about 3884.7429773410. The cubic root of 15091228 is about 247.1201696890.

It can be divided in two parts, 150 and 91228, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 15091228 in words is "fifteen million, ninety-one thousand, two hundred twenty-eight".