12849940 has 24 divisors (see below), whose sum is σ = 27132840. Its totient is φ = 5111808.

The previous prime is 12849937. The next prime is 12849953. The reversal of 12849940 is 4994821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 219024 + 12630916 = 468^2 + 3554^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12849940.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2196 + ... + 5524.

It is an arithmetic number, because the mean of its divisors is an integer number (1130535).

Almost surely, 2^12849940 is an apocalyptic number.

12849940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12849940 is an abundant number, since it is smaller than the sum of its proper divisors (14282900).

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

12849940 is a wasteful number, since it uses less digits than its factorization.

12849940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3531 (or 3529 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 12849940 is about 3584.6812968519. The cubic root of 12849940 is about 234.2252439472.

The spelling of 12849940 in words is "twelve million, eight hundred forty-nine thousand, nine hundred forty".