15138228 has 48 divisors (see below), whose sum is σ = 42747264. Its totient is φ = 4070400.

The previous prime is 15138197. The next prime is 15138239. The reversal of 15138228 is 82283151.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 15138195 and 15138204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3873 + ... + 6728.

It is an arithmetic number, because the mean of its divisors is an integer number (890568).

Almost surely, 2^15138228 is an apocalyptic number.

It is an amenable number.

15138228 is an abundant number, since it is smaller than the sum of its proper divisors (27609036).

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

15138228 is a wasteful number, since it uses less digits than its factorization.

15138228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10632 (or 10630 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The square root of 15138228 is about 3890.7875809404. The cubic root of 15138228 is about 247.3764468515.

The spelling of 15138228 in words is "fifteen million, one hundred thirty-eight thousand, two hundred twenty-eight".