12913830 has 80 divisors (see below), whose sum is σ = 35283600. Its totient is φ = 3388608.

The previous prime is 12913819. The next prime is 12913843. The reversal of 12913830 is 3831921.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12913794 and 12913803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 86596 + ... + 86744.

It is an arithmetic number, because the mean of its divisors is an integer number (441045).

Almost surely, 2^12913830 is an apocalyptic number.

12913830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12913830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17641800).

12913830 is an abundant number, since it is smaller than the sum of its proper divisors (22369770).

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

12913830 is a wasteful number, since it uses less digits than its factorization.

12913830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12913830 is about 3593.5817786715. The cubic root of 12913830 is about 234.6127922591.

The spelling of 12913830 in words is "twelve million, nine hundred thirteen thousand, eight hundred thirty".