12789990 has 24 divisors (see below), whose sum is σ = 33254208. Its totient is φ = 3410640.

The previous prime is 12789979. The next prime is 12790007. The reversal of 12789990 is 9998721.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70966 + ... + 71145.

It is an arithmetic number, because the mean of its divisors is an integer number (1385592).

Almost surely, 2^12789990 is an apocalyptic number.

12789990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12789990 is an abundant number, since it is smaller than the sum of its proper divisors (20464218).

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

12789990 is a wasteful number, since it uses less digits than its factorization.

12789990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142124 (or 142121 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 12789990 is about 3576.3095503605. The cubic root of 12789990 is about 233.8604252013.

The spelling of 12789990 in words is "twelve million, seven hundred eighty-nine thousand, nine hundred ninety".