15243840 has 168 divisors, whose sum is σ = 53888640. Its totient is φ = 3953664.

The previous prime is 15243827. The next prime is 15243857. The reversal of 15243840 is 4834251.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192921 + ... + 192999.

Almost surely, 2^15243840 is an apocalyptic number.

15243840 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 15243840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26944320).

15243840 is an abundant number, since it is smaller than the sum of its proper divisors (38644800).

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

15243840 is a wasteful number, since it uses less digits than its factorization.

15243840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 15243840 is about 3904.3360511104. The cubic root of 15243840 is about 247.9503889663.

The spelling of 15243840 in words is "fifteen million, two hundred forty-three thousand, eight hundred forty".