13797220 has 24 divisors (see below), whose sum is σ = 29244600. Its totient is φ = 5467392.

The previous prime is 13797193. The next prime is 13797221. The reversal of 13797220 is 2279731.

It can be written as a sum of positive squares in 4 ways, for example, as 3912484 + 9884736 = 1978^2 + 3144^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13797221) 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 7 ways as a sum of consecutive naturals, for example, 985 + ... + 5344.

It is an arithmetic number, because the mean of its divisors is an integer number (1218525).

Almost surely, 2^13797220 is an apocalyptic number.

13797220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13797220 is an abundant number, since it is smaller than the sum of its proper divisors (15447380).

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

13797220 is a wasteful number, since it uses less digits than its factorization.

13797220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6447 (or 6445 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 13797220 is about 3714.4609299332. The cubic root of 13797220 is about 239.8449229660.

The spelling of 13797220 in words is "thirteen million, seven hundred ninety-seven thousand, two hundred twenty".