15696540 has 144 divisors (see below), whose sum is σ = 51367680. Its totient is φ = 3870720.

The previous prime is 15696503. The next prime is 15696553. The reversal of 15696540 is 4569651.

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 = 15696495 and 15696504.

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 47 ways as a sum of consecutive naturals, for example, 161772 + ... + 161868.

It is an arithmetic number, because the mean of its divisors is an integer number (356720).

Almost surely, 2^15696540 is an apocalyptic number.

15696540 is a gapful number since it is divisible by the number (10) 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 15696540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25683840).

15696540 is an abundant number, since it is smaller than the sum of its proper divisors (35671140).

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

15696540 is a wasteful number, since it uses less digits than its factorization.

15696540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 15696540 is about 3961.8859145614. The cubic root of 15696540 is about 250.3809658319.

The spelling of 15696540 in words is "fifteen million, six hundred ninety-six thousand, five hundred forty".