15247728 has 60 divisors (see below), whose sum is σ = 44926440. Its totient is φ = 4814208.

The previous prime is 15247723. The next prime is 15247741. The reversal of 15247728 is 82774251.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 15247692 and 15247701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15247723) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 51 + ... + 5522.

It is an arithmetic number, because the mean of its divisors is an integer number (748774).

Almost surely, 2^15247728 is an apocalyptic number.

15247728 is a gapful number since it is divisible by the number (18) 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 15247728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22463220).

15247728 is an abundant number, since it is smaller than the sum of its proper divisors (29678712).

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

15247728 is a wasteful number, since it uses less digits than its factorization.

15247728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5606 (or 5597 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 15247728 is about 3904.8339273265. The cubic root of 15247728 is about 247.9714674077.

The spelling of 15247728 in words is "fifteen million, two hundred forty-seven thousand, seven hundred twenty-eight".