13985220 has 48 divisors (see below), whose sum is σ = 41465088. Its totient is φ = 3509760.

The previous prime is 13985189. The next prime is 13985233. The reversal of 13985220 is 2258931.

It is a happy number.

13985220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5836 + ... + 7875.

It is an arithmetic number, because the mean of its divisors is an integer number (863856).

Almost surely, 2^13985220 is an apocalyptic number.

13985220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13985220 is an abundant number, since it is smaller than the sum of its proper divisors (27479868).

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

13985220 is a wasteful number, since it uses less digits than its factorization.

13985220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13740 (or 13738 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 13985220 is about 3739.6818046460. The cubic root of 13985220 is about 240.9293824996.

The spelling of 13985220 in words is "thirteen million, nine hundred eighty-five thousand, two hundred twenty".