12873978 has 40 divisors (see below), whose sum is σ = 31071348. Its totient is φ = 3960576.

The previous prime is 12873943. The next prime is 12874007. The reversal of 12873978 is 87937821.

12873978 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 2 ways, for example, as 12510369 + 363609 = 3537^2 + 603^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 951 + ... + 5162.

Almost surely, 2^12873978 is an apocalyptic number.

12873978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12873978 is an abundant number, since it is smaller than the sum of its proper divisors (18197370).

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

12873978 is a wasteful number, since it uses less digits than its factorization.

12873978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140 (or 6131 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 12873978 is about 3588.0326085475. The cubic root of 12873978 is about 234.3712056986.

The spelling of 12873978 in words is "twelve million, eight hundred seventy-three thousand, nine hundred seventy-eight".