15920216 has 32 divisors (see below), whose sum is σ = 32840640. Its totient is φ = 7189248.

The previous prime is 15920189. The next prime is 15920237. The reversal of 15920216 is 61202951.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3260 + ... + 6516.

It is an arithmetic number, because the mean of its divisors is an integer number (1026270).

Almost surely, 2^15920216 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 15920216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16420320).

15920216 is an abundant number, since it is smaller than the sum of its proper divisors (16920424).

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

15920216 is a wasteful number, since it uses less digits than its factorization.

15920216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3323 (or 3319 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 15920216 is about 3990.0145363144. The cubic root of 15920216 is about 251.5646721081.

The spelling of 15920216 in words is "fifteen million, nine hundred twenty thousand, two hundred sixteen".