12895780 has 12 divisors (see below), whose sum is σ = 27081180. Its totient is φ = 5158304.

The previous prime is 12895777. The next prime is 12895787. The reversal of 12895780 is 8759821.

It can be written as a sum of positive squares in 2 ways, for example, as 6260004 + 6635776 = 2502^2 + 2576^2 .

It is a super-2 number, since 2×12895780² = 332602283616800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12895787) 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, 322375 + ... + 322414.

It is an arithmetic number, because the mean of its divisors is an integer number (2256765).

Almost surely, 2^12895780 is an apocalyptic number.

12895780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12895780 is an abundant number, since it is smaller than the sum of its proper divisors (14185400).

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

12895780 is a wasteful number, since it uses less digits than its factorization.

12895780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644798 (or 644796 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 12895780 is about 3591.0694785816. The cubic root of 12895780 is about 234.5034331341.

The spelling of 12895780 in words is "twelve million, eight hundred ninety-five thousand, seven hundred eighty".