13215390 has 32 divisors (see below), whose sum is σ = 31828896. Its totient is φ = 3511680.

The previous prime is 13215383. The next prime is 13215421. The reversal of 13215390 is 9351231.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13215390.

It is a congruent number.

It is an unprimeable number.

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, 10600 + ... + 11780.

It is an arithmetic number, because the mean of its divisors is an integer number (994653).

Almost surely, 2^13215390 is an apocalyptic number.

13215390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13215390 is an abundant number, since it is smaller than the sum of its proper divisors (18613506).

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

13215390 is a wasteful number, since it uses less digits than its factorization.

13215390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 13215390 is about 3635.2977869770. The cubic root of 13215390 is about 236.4249620773.

The spelling of 13215390 in words is "thirteen million, two hundred fifteen thousand, three hundred ninety".