15220872 has 80 divisors (see below), whose sum is σ = 43298640. Its totient is φ = 4994784.

The previous prime is 15220867. The next prime is 15220883. The reversal of 15220872 is 27802251.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53643 + ... + 53925.

It is an arithmetic number, because the mean of its divisors is an integer number (541233).

Almost surely, 2^15220872 is an apocalyptic number.

15220872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15220872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21649320).

15220872 is an abundant number, since it is smaller than the sum of its proper divisors (28077768).

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

15220872 is a wasteful number, since it uses less digits than its factorization.

15220872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 15220872 is about 3901.3935971650. The cubic root of 15220872 is about 247.8257968442.

The spelling of 15220872 in words is "fifteen million, two hundred twenty thousand, eight hundred seventy-two".