15942240 has 72 divisors (see below), whose sum is σ = 54407808. Its totient is φ = 4250880.

The previous prime is 15942229. The next prime is 15942253. The reversal of 15942240 is 4224951.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4096 + ... + 6975.

It is an arithmetic number, because the mean of its divisors is an integer number (755664).

Almost surely, 2^15942240 is an apocalyptic number.

15942240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15942240 is an abundant number, since it is smaller than the sum of its proper divisors (38465568).

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

15942240 is a wasteful number, since it uses less digits than its factorization.

15942240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11092 (or 11081 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 15942240 is about 3992.7734721619. The cubic root of 15942240 is about 251.6806233702.

The spelling of 15942240 in words is "fifteen million, nine hundred forty-two thousand, two hundred forty".