12878500 has 48 divisors (see below), whose sum is σ = 28828800. Its totient is φ = 5023200.

The previous prime is 12878491. The next prime is 12878519. The reversal of 12878500 is 587821.

12878500 = 721² + 722² + ... + 744².

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, 21201 + ... + 21799.

It is an arithmetic number, because the mean of its divisors is an integer number (600600).

Almost surely, 2^12878500 is an apocalyptic number.

12878500 is a gapful number since it is divisible by the number (10) 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 12878500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14414400).

12878500 is an abundant number, since it is smaller than the sum of its proper divisors (15950300).

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

12878500 is a wasteful number, since it uses less digits than its factorization.

12878500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 12878500 is about 3588.6627035708. The cubic root of 12878500 is about 234.3986435407.

The spelling of 12878500 in words is "twelve million, eight hundred seventy-eight thousand, five hundred".