15398940 has 96 divisors (see below), whose sum is σ = 47222784. Its totient is φ = 3732480.

The previous prime is 15398893. The next prime is 15398959. The reversal of 15398940 is 4989351.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 31377 + ... + 31863.

It is an arithmetic number, because the mean of its divisors is an integer number (491904).

Almost surely, 2^15398940 is an apocalyptic number.

15398940 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 15398940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23611392).

15398940 is an abundant number, since it is smaller than the sum of its proper divisors (31823844).

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

15398940 is a wasteful number, since it uses less digits than its factorization.

15398940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 15398940 is about 3924.1483152399. The cubic root of 15398940 is about 248.7884850769.

The spelling of 15398940 in words is "fifteen million, three hundred ninety-eight thousand, nine hundred forty".