12840788 has 12 divisors (see below), whose sum is σ = 22500660. Its totient is φ = 6412032.

The previous prime is 12840781. The next prime is 12840791. The reversal of 12840788 is 88704821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4008004 + 8832784 = 2002^2 + 2972^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2468 + ... + 5636.

It is an arithmetic number, because the mean of its divisors is an integer number (1875055).

Almost surely, 2^12840788 is an apocalyptic number.

It is an amenable number.

12840788 is a deficient number, since it is larger than the sum of its proper divisors (9659872).

12840788 is a wasteful number, since it uses less digits than its factorization.

12840788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186 (or 4184 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 12840788 is about 3583.4045264246. The cubic root of 12840788 is about 234.1696240105.

The spelling of 12840788 in words is "twelve million, eight hundred forty thousand, seven hundred eighty-eight".