13220690 has 24 divisors (see below), whose sum is σ = 27683532. Its totient is φ = 4532640.

The previous prime is 13220687. The next prime is 13220717. The reversal of 13220690 is 9602231.

It can be written as a sum of positive squares in 2 ways, for example, as 12103441 + 1117249 = 3479^2 + 1057^2 .

It is a super-2 number, since 2×13220690² = 349573288152200, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 13001 + ... + 13980.

Almost surely, 2^13220690 is an apocalyptic number.

13220690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13220690 is an abundant number, since it is smaller than the sum of its proper divisors (14462842).

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

13220690 is a wasteful number, since it uses less digits than its factorization.

13220690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27002 (or 26995 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 13220690 is about 3636.0266775699. The cubic root of 13220690 is about 236.4565637383.

The spelling of 13220690 in words is "thirteen million, two hundred twenty thousand, six hundred ninety".