15243940 has 48 divisors (see below), whose sum is σ = 34513920. Its totient is φ = 5639040.

The previous prime is 15243931. The next prime is 15243959. The reversal of 15243940 is 4934251.

It is a junction number, because it is equal to n+sod(n) for n = 15243899 and 15243908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13726 + ... + 14794.

It is an arithmetic number, because the mean of its divisors is an integer number (719040).

Almost surely, 2^15243940 is an apocalyptic number.

15243940 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 15243940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17256960).

15243940 is an abundant number, since it is smaller than the sum of its proper divisors (19269980).

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

15243940 is a wasteful number, since it uses less digits than its factorization.

15243940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 15243940 is about 3904.3488573641. The cubic root of 15243940 is about 247.9509311522.

It can be divided in two parts, 1 and 5243940, that added together give a triangular number (5243941 = T₃₂₃₈).

The spelling of 15243940 in words is "fifteen million, two hundred forty-three thousand, nine hundred forty".