15320228 has 24 divisors (see below), whose sum is σ = 33426624. Its totient is φ = 5968800.

The previous prime is 15320219. The next prime is 15320237. The reversal of 15320228 is 82202351.

It is an interprime number because it is at equal distance from previous prime (15320219) and next prime (15320237).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24563 + ... + 25178.

It is an arithmetic number, because the mean of its divisors is an integer number (1392776).

Almost surely, 2^15320228 is an apocalyptic number.

It is an amenable number.

15320228 is an abundant number, since it is smaller than the sum of its proper divisors (18106396).

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

15320228 is a wasteful number, since it uses less digits than its factorization.

15320228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49763 (or 49761 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 15320228 is about 3914.1062836872. The cubic root of 15320228 is about 248.3638649407.

Adding to 15320228 its reverse (82202351), we get a palindrome (97522579).

The spelling of 15320228 in words is "fifteen million, three hundred twenty thousand, two hundred twenty-eight".