15997296 has 80 divisors (see below), whose sum is σ = 48282624. Its totient is φ = 4468992.

The previous prime is 15997291. The next prime is 15997307. The reversal of 15997296 is 69279951.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15997291) 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 15 ways as a sum of consecutive naturals, for example, 15286 + ... + 16298.

Almost surely, 2^15997296 is an apocalyptic number.

15997296 is a gapful number since it is divisible by the number (16) 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 15997296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24141312).

15997296 is an abundant number, since it is smaller than the sum of its proper divisors (32285328).

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

15997296 is a wasteful number, since it uses less digits than its factorization.

15997296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078 (or 1072 counting only the distinct ones).

The product of its digits is 306180, while the sum is 48.

The square root of 15997296 is about 3999.6619857183. The cubic root of 15997296 is about 251.9700140687.

The spelling of 15997296 in words is "fifteen million, nine hundred ninety-seven thousand, two hundred ninety-six".