12747990 has 32 divisors (see below), whose sum is σ = 31019616. Its totient is φ = 3352320.

The previous prime is 12747983. The next prime is 12748013. The reversal of 12747990 is 9974721.

It is a super-2 number, since 2×12747990² = 325022498080200, which contains 22 as substring.

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, 721 + ... + 5100.

It is an arithmetic number, because the mean of its divisors is an integer number (969363).

Almost surely, 2^12747990 is an apocalyptic number.

12747990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12747990 is an abundant number, since it is smaller than the sum of its proper divisors (18271626).

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

12747990 is a wasteful number, since it uses less digits than its factorization.

12747990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5904.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 12747990 is about 3570.4327468810. The cubic root of 12747990 is about 233.6041594579.

The spelling of 12747990 in words is "twelve million, seven hundred forty-seven thousand, nine hundred ninety".