13878780 has 48 divisors (see below), whose sum is σ = 39070080. Its totient is φ = 3681088.

The previous prime is 13878779. The next prime is 13878803. The reversal of 13878780 is 8787831.

It is a congruent number.

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, 13111 + ... + 14129.

It is an arithmetic number, because the mean of its divisors is an integer number (813960).

Almost surely, 2^13878780 is an apocalyptic number.

13878780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13878780 is an abundant number, since it is smaller than the sum of its proper divisors (25191300).

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

13878780 is a wasteful number, since it uses less digits than its factorization.

13878780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 13878780 is about 3725.4234658626. The cubic root of 13878780 is about 240.3165960675.

The spelling of 13878780 in words is "thirteen million, eight hundred seventy-eight thousand, seven hundred eighty".