15788940 has 48 divisors (see below), whose sum is σ = 44782080. Its totient is φ = 4155840.

The previous prime is 15788939. The next prime is 15788947. The reversal of 15788940 is 4988751.

It is a junction number, because it is equal to n+sod(n) for n = 15788892 and 15788901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15788947) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3075 + ... + 6405.

It is an arithmetic number, because the mean of its divisors is an integer number (932960).

Almost surely, 2^15788940 is an apocalyptic number.

15788940 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 15788940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22391040).

15788940 is an abundant number, since it is smaller than the sum of its proper divisors (28993140).

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

15788940 is a wasteful number, since it uses less digits than its factorization.

15788940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422 (or 3420 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 15788940 is about 3973.5299168372. The cubic root of 15788940 is about 250.8713064392.

The spelling of 15788940 in words is "fifteen million, seven hundred eighty-eight thousand, nine hundred forty".