13847220 has 48 divisors (see below), whose sum is σ = 43081920. Its totient is φ = 3692448.

The previous prime is 13847209. The next prime is 13847237. The reversal of 13847220 is 2274831.

13847220 = T₁₁₅ + T₁₁₆ + ... + T₄₃₈.

13847220 is digitally balanced in base 2 and base 4, because in such bases 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 (27).

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, 12282 + ... + 13361.

It is an arithmetic number, because the mean of its divisors is an integer number (897540).

Almost surely, 2^13847220 is an apocalyptic number.

13847220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13847220 is an abundant number, since it is smaller than the sum of its proper divisors (29234700).

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

13847220 is a wasteful number, since it uses less digits than its factorization.

13847220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25661 (or 25653 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 13847220 is about 3721.1852950371. The cubic root of 13847220 is about 240.1342998341.

The spelling of 13847220 in words is "thirteen million, eight hundred forty-seven thousand, two hundred twenty".