13220770 has 32 divisors (see below), whose sum is σ = 25272000. Its totient is φ = 4965696.

The previous prime is 13220749. The next prime is 13220773. The reversal of 13220770 is 7702231.

It is not an unprimeable number, because it can be changed into a prime (13220773) by changing a digit.

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, 28077 + ... + 28543.

It is an arithmetic number, because the mean of its divisors is an integer number (789750).

Almost surely, 2^13220770 is an apocalyptic number.

13220770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13220770 is a deficient number, since it is larger than the sum of its proper divisors (12051230).

13220770 is a wasteful number, since it uses less digits than its factorization.

13220770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 13220770 is about 3636.0376785727. The cubic root of 13220770 is about 236.4570406798.

It can be divided in two parts, 132 and 20770, that added together give a palindrome (20902).

The spelling of 13220770 in words is "thirteen million, two hundred twenty thousand, seven hundred seventy".