12277990 has 16 divisors (see below), whose sum is σ = 23263920. Its totient is φ = 4652640.

The previous prime is 12277981. The next prime is 12278003. The reversal of 12277990 is 9977221.

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, 32121 + ... + 32500.

It is an arithmetic number, because the mean of its divisors is an integer number (1453995).

Almost surely, 2^12277990 is an apocalyptic number.

12277990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12277990 is a deficient number, since it is larger than the sum of its proper divisors (10985930).

12277990 is a wasteful number, since it uses less digits than its factorization.

12277990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64647.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 12277990 is about 3503.9962899524. The cubic root of 12277990 is about 230.6972539916.

The spelling of 12277990 in words is "twelve million, two hundred seventy-seven thousand, nine hundred ninety".