12787830 has 48 divisors (see below), whose sum is σ = 36273744. Its totient is φ = 3099840.

The previous prime is 12787823. The next prime is 12787843. The reversal of 12787830 is 3878721.

It is a super-2 number, since 2×12787830² = 327057192217800, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5469 + ... + 7448.

It is an arithmetic number, because the mean of its divisors is an integer number (755703).

Almost surely, 2^12787830 is an apocalyptic number.

12787830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12787830 is an abundant number, since it is smaller than the sum of its proper divisors (23485914).

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

12787830 is a wasteful number, since it uses less digits than its factorization.

12787830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12941 (or 12938 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 12787830 is about 3576.0075503276. The cubic root of 12787830 is about 233.8472595158.

The spelling of 12787830 in words is "twelve million, seven hundred eighty-seven thousand, eight hundred thirty".