15162228 has 72 divisors (see below), whose sum is σ = 41889120. Its totient is φ = 4782240.

The previous prime is 15162223. The next prime is 15162241. The reversal of 15162228 is 82226151.

It is a happy number.

15162228 is a `hidden beast` number, since 15 + 1 + 622 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15162223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18058 + ... + 18878.

Almost surely, 2^15162228 is an apocalyptic number.

15162228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

15162228 is the 2463-rd heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15162228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20944560).

15162228 is an abundant number, since it is smaller than the sum of its proper divisors (26726892).

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

15162228 is a wasteful number, since it uses less digits than its factorization.

15162228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859 (or 845 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 15162228 is about 3893.8705679568. The cubic root of 15162228 is about 247.5071072339.

Adding to 15162228 its reverse (82226151), we get a palindrome (97388379).

The spelling of 15162228 in words is "fifteen million, one hundred sixty-two thousand, two hundred twenty-eight".