13220890 has 8 divisors (see below), whose sum is σ = 23797620. Its totient is φ = 5288352.

The previous prime is 13220881. The next prime is 13220891. The reversal of 13220890 is 9802231.

13220890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13198689 + 22201 = 3633^2 + 149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (13220891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661035 + ... + 661054.

Almost surely, 2^13220890 is an apocalyptic number.

13220890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13220890 is a deficient number, since it is larger than the sum of its proper divisors (10576730).

13220890 is a wasteful number, since it uses less digits than its factorization.

13220890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322096.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 13220890 is about 3636.0541800144. The cubic root of 13220890 is about 236.4577560885.

The spelling of 13220890 in words is "thirteen million, two hundred twenty thousand, eight hundred ninety".