13220494 has 24 divisors (see below), whose sum is σ = 23195808. Its totient is φ = 5634720.

The previous prime is 13220461. The next prime is 13220521. The reversal of 13220494 is 49402231.

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 11 ways as a sum of consecutive naturals, for example, 30459 + ... + 30889.

It is an arithmetic number, because the mean of its divisors is an integer number (966492).

Almost surely, 2^13220494 is an apocalyptic number.

13220494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

13220494 is a deficient number, since it is larger than the sum of its proper divisors (9975314).

13220494 is a wasteful number, since it uses less digits than its factorization.

13220494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 13220494 is about 3635.9997249725. Note that the first 3 decimals coincide. The cubic root of 13220494 is about 236.4553952236.

The spelling of 13220494 in words is "thirteen million, two hundred twenty thousand, four hundred ninety-four".