15942272 has 32 divisors (see below), whose sum is σ = 32313600. Its totient is φ = 7832320.

The previous prime is 15942253. The next prime is 15942281. The reversal of 15942272 is 27224951.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6497 + ... + 8607.

It is an arithmetic number, because the mean of its divisors is an integer number (1009800).

Almost surely, 2^15942272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15942272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16156800).

15942272 is an abundant number, since it is smaller than the sum of its proper divisors (16371328).

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

15942272 is an equidigital number, since it uses as much as digits as its factorization.

15942272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184 (or 2172 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 15942272 is about 3992.7774793995. Note that the first 3 decimals coincide. The cubic root of 15942272 is about 251.6807917650.

The spelling of 15942272 in words is "fifteen million, nine hundred forty-two thousand, two hundred seventy-two".