15140440 has 64 divisors (see below), whose sum is σ = 40642560. Its totient is φ = 4963200.

The previous prime is 15140381. The next prime is 15140449. The reversal of 15140440 is 4404151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15140449) by changing a digit.

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, 5265 + ... + 7615.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^15140440 is an apocalyptic number.

15140440 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 15140440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20321280).

15140440 is an abundant number, since it is smaller than the sum of its proper divisors (25502120).

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

15140440 is a wasteful number, since it uses less digits than its factorization.

15140440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392 (or 2388 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 15140440 is about 3891.0718317708. The cubic root of 15140440 is about 247.3884951584.

Adding to 15140440 its reverse (4404151), we get a palindrome (19544591).

The spelling of 15140440 in words is "fifteen million, one hundred forty thousand, four hundred forty".