12878385 has 32 divisors (see below), whose sum is σ = 22366848. Its totient is φ = 6289920.

The previous prime is 12878377. The next prime is 12878431. The reversal of 12878385 is 58387821.

12878385 = 248² + 249² + ... + 377².

It is a happy number.

It is not a de Polignac number, because 12878385 - 2³ = 12878377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40989 + ... + 41301.

It is an arithmetic number, because the mean of its divisors is an integer number (698964).

Almost surely, 2^12878385 is an apocalyptic number.

12878385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12878385 is a deficient number, since it is larger than the sum of its proper divisors (9488463).

12878385 is a wasteful number, since it uses less digits than its factorization.

12878385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545.

The product of its digits is 107520, while the sum is 42.

The square root of 12878385 is about 3588.6466808534. The cubic root of 12878385 is about 234.3979458424.

The spelling of 12878385 in words is "twelve million, eight hundred seventy-eight thousand, three hundred eighty-five".