15978496 has 52 divisors (see below), whose sum is σ = 33026112. Its totient is φ = 7725056.

The previous prime is 15978481. The next prime is 15978497. The reversal of 15978496 is 69487951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15978497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192471 + ... + 192553.

Almost surely, 2^15978496 is an apocalyptic number.

15978496 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 15978496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16513056).

15978496 is an abundant number, since it is smaller than the sum of its proper divisors (17047616).

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

15978496 is an frugal number, since it uses more digits than its factorization.

15978496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 132 counting only the distinct ones).

The product of its digits is 544320, while the sum is 49.

The square root of 15978496 is about 3997.3110962246. The cubic root of 15978496 is about 251.8712704409.

The spelling of 15978496 in words is "fifteen million, nine hundred seventy-eight thousand, four hundred ninety-six".