15972540 has 48 divisors (see below), whose sum is σ = 47080320. Its totient is φ = 4034880.

The previous prime is 15972529. The next prime is 15972553. The reversal of 15972540 is 4527951.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5866 + ... + 8145.

It is an arithmetic number, because the mean of its divisors is an integer number (980840).

Almost surely, 2^15972540 is an apocalyptic number.

15972540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15972540 is an abundant number, since it is smaller than the sum of its proper divisors (31107780).

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

15972540 is a wasteful number, since it uses less digits than its factorization.

15972540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14042 (or 14040 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 15972540 is about 3996.5660259778. The cubic root of 15972540 is about 251.8399714642.

The spelling of 15972540 in words is "fifteen million, nine hundred seventy-two thousand, five hundred forty".