15399456 has 48 divisors (see below), whose sum is σ = 41295744. Its totient is φ = 5022464.

The previous prime is 15399451. The next prime is 15399457. The reversal of 15399456 is 65499351.

15399456 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 (48).

It is not an unprimeable number, because it can be changed into a prime (15399451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2806 + ... + 6218.

It is an arithmetic number, because the mean of its divisors is an integer number (860328).

Almost surely, 2^15399456 is an apocalyptic number.

15399456 is a gapful number since it is divisible by the number (16) 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 15399456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20647872).

15399456 is an abundant number, since it is smaller than the sum of its proper divisors (25896288).

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

15399456 is a wasteful number, since it uses less digits than its factorization.

15399456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3473 (or 3465 counting only the distinct ones).

The product of its digits is 145800, while the sum is 42.

The square root of 15399456 is about 3924.2140614396. The cubic root of 15399456 is about 248.7912639137.

The spelling of 15399456 in words is "fifteen million, three hundred ninety-nine thousand, four hundred fifty-six".