15223680 has 128 divisors (see below), whose sum is σ = 53978400. Its totient is φ = 4055040.

The previous prime is 15223679. The next prime is 15223727. The reversal of 15223680 is 8632251.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

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, 16840 + ... + 17720.

Almost surely, 2^15223680 is an apocalyptic number.

15223680 is a gapful number since it is divisible by the number (10) 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 15223680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26989200).

15223680 is an abundant number, since it is smaller than the sum of its proper divisors (38754720).

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

15223680 is an equidigital number, since it uses as much as digits as its factorization.

15223680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 15223680 is about 3901.7534519752. The cubic root of 15223680 is about 247.8410358320.

It can be divided in two parts, 152 and 23680, that added together give a palindrome (23832).

The spelling of 15223680 in words is "fifteen million, two hundred twenty-three thousand, six hundred eighty".