12899790 has 32 divisors (see below), whose sum is σ = 34400160. Its totient is φ = 3439872.

The previous prime is 12899773. The next prime is 12899797. The reversal of 12899790 is 9799821.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12899797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23619 + ... + 24158.

It is an arithmetic number, because the mean of its divisors is an integer number (1075005).

Almost surely, 2^12899790 is an apocalyptic number.

12899790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12899790 is an abundant number, since it is smaller than the sum of its proper divisors (21500370).

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

12899790 is a wasteful number, since it uses less digits than its factorization.

12899790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47793 (or 47787 counting only the distinct ones).

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

The square root of 12899790 is about 3591.6277646772. The cubic root of 12899790 is about 234.5277372427.

It can be divided in two parts, 12899 and 790, that added together give a square (13689 = 117²).

The spelling of 12899790 in words is "twelve million, eight hundred ninety-nine thousand, seven hundred ninety".