12777890 has 32 divisors (see below), whose sum is σ = 24274944. Its totient is φ = 4835520.

The previous prime is 12777889. The next prime is 12777901. The reversal of 12777890 is 9877721.

12777890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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, 14132 + ... + 15008.

It is an arithmetic number, because the mean of its divisors is an integer number (758592).

Almost surely, 2^12777890 is an apocalyptic number.

12777890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12777890 is a deficient number, since it is larger than the sum of its proper divisors (11497054).

12777890 is a wasteful number, since it uses less digits than its factorization.

12777890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962.

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 12777890 is about 3574.6174620510. The cubic root of 12777890 is about 233.7866538649.

The spelling of 12777890 in words is "twelve million, seven hundred seventy-seven thousand, eight hundred ninety".