15440412 has 48 divisors (see below), whose sum is σ = 40148640. Its totient is φ = 4585728.

The previous prime is 15440401. The next prime is 15440413. The reversal of 15440412 is 21404451.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15440413) 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, 2818 + ... + 6230.

It is an arithmetic number, because the mean of its divisors is an integer number (836430).

Almost surely, 2^15440412 is an apocalyptic number.

15440412 is a gapful number since it is divisible by the number (12) 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 15440412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20074320).

15440412 is an abundant number, since it is smaller than the sum of its proper divisors (24708228).

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

15440412 is a wasteful number, since it uses less digits than its factorization.

15440412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462 (or 3460 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 15440412 is about 3929.4289661476. The cubic root of 15440412 is about 249.0116283016.

Adding to 15440412 its reverse (21404451), we get a palindrome (36844863).

The spelling of 15440412 in words is "fifteen million, four hundred forty thousand, four hundred twelve".