15940256 has 48 divisors (see below), whose sum is σ = 32999400. Its totient is φ = 7569408.

The previous prime is 15940247. The next prime is 15940261. The reversal of 15940256 is 65204951.

It is a happy number.

15940256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9610000 + 6330256 = 3100^2 + 2516^2 .

It is a super-2 number, since 2×15940256² = 508183522691072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82496 + ... + 82688.

Almost surely, 2^15940256 is an apocalyptic number.

15940256 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 15940256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16499700).

15940256 is an abundant number, since it is smaller than the sum of its proper divisors (17059144).

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

15940256 is a wasteful number, since it uses less digits than its factorization.

15940256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 15940256 is about 3992.5250155760. The cubic root of 15940256 is about 251.6701824478.

The spelling of 15940256 in words is "fifteen million, nine hundred forty thousand, two hundred fifty-six".