15256780 has 48 divisors (see below), whose sum is σ = 39949056. Its totient is φ = 4754880.

The previous prime is 15256723. The next prime is 15256799. The reversal of 15256780 is 8765251.

15256780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 3414 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (832272).

Almost surely, 2^15256780 is an apocalyptic number.

15256780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15256780 is an abundant number, since it is smaller than the sum of its proper divisors (24692276).

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

15256780 is a wasteful number, since it uses less digits than its factorization.

15256780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9934 (or 9932 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 15256780 is about 3905.9928315346. The cubic root of 15256780 is about 248.0205281308.

It can be divided in two parts, 15 and 256780, that multiplied together give a triangular number (3851700 = T₂₇₇₅).

The spelling of 15256780 in words is "fifteen million, two hundred fifty-six thousand, seven hundred eighty".