12861390 has 32 divisors (see below), whose sum is σ = 31220640. Its totient is φ = 3390464.

The previous prime is 12861379. The next prime is 12861391. The reversal of 12861390 is 9316821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12861391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262 + ... + 5078.

It is an arithmetic number, because the mean of its divisors is an integer number (975645).

Almost surely, 2^12861390 is an apocalyptic number.

12861390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12861390 is an abundant number, since it is smaller than the sum of its proper divisors (18359250).

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

12861390 is a wasteful number, since it uses less digits than its factorization.

12861390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4916.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 12861390 is about 3586.2780148784. The cubic root of 12861390 is about 234.2947924657.

The spelling of 12861390 in words is "twelve million, eight hundred sixty-one thousand, three hundred ninety".