13422820 has 12 divisors (see below), whose sum is σ = 28187964. Its totient is φ = 5369120.

The previous prime is 13422817. The next prime is 13422821. The reversal of 13422820 is 2822431.

It can be written as a sum of positive squares in 2 ways, for example, as 3041536 + 10381284 = 1744^2 + 3222^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13422791 and 13422800.

It is not an unprimeable number, because it can be changed into a prime (13422821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335551 + ... + 335590.

It is an arithmetic number, because the mean of its divisors is an integer number (2348997).

Almost surely, 2^13422820 is an apocalyptic number.

13422820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13422820 is an abundant number, since it is smaller than the sum of its proper divisors (14765144).

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

13422820 is a wasteful number, since it uses less digits than its factorization.

13422820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671150 (or 671148 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 13422820 is about 3663.7166921038. The cubic root of 13422820 is about 237.6555287841.

The spelling of 13422820 in words is "thirteen million, four hundred twenty-two thousand, eight hundred twenty".