15244240 has 80 divisors (see below), whose sum is σ = 40979520. Its totient is φ = 5212160.

The previous prime is 15244211. The next prime is 15244253. The reversal of 15244240 is 4244251.

It is a happy number.

15244240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14451 + ... + 15469.

It is an arithmetic number, because the mean of its divisors is an integer number (512244).

Almost surely, 2^15244240 is an apocalyptic number.

15244240 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 15244240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20489760).

15244240 is an abundant number, since it is smaller than the sum of its proper divisors (25735280).

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

15244240 is a wasteful number, since it uses less digits than its factorization.

15244240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060 (or 1054 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 15244240 is about 3904.3872758731. The cubic root of 15244240 is about 247.9525576956.

Adding to 15244240 its reverse (4244251), we get a palindrome (19488491).

The spelling of 15244240 in words is "fifteen million, two hundred forty-four thousand, two hundred forty".