13997830 has 80 divisors (see below), whose sum is σ = 32670864. Its totient is φ = 4280640.

The previous prime is 13997827. The next prime is 13997839. The reversal of 13997830 is 3879931.

13997830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 15.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13997839) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 264084 + ... + 264136.

Almost surely, 2^13997830 is an apocalyptic number.

13997830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13997830 is an abundant number, since it is smaller than the sum of its proper divisors (18673034).

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

13997830 is an equidigital number, since it uses as much as digits as its factorization.

13997830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 13997830 is about 3741.3673970889. The cubic root of 13997830 is about 241.0017733724.

It can be divided in two parts, 1399 and 7830, that added together give a palindrome (9229).

The spelling of 13997830 in words is "thirteen million, nine hundred ninety-seven thousand, eight hundred thirty".