13915820 has 12 divisors (see below), whose sum is σ = 29223264. Its totient is φ = 5566320.

The previous prime is 13915819. The next prime is 13915829. The reversal of 13915820 is 2851931.

13915820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13915829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347876 + ... + 347915.

It is an arithmetic number, because the mean of its divisors is an integer number (2435272).

Almost surely, 2^13915820 is an apocalyptic number.

13915820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13915820 is an abundant number, since it is smaller than the sum of its proper divisors (15307444).

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

13915820 is a wasteful number, since it uses less digits than its factorization.

13915820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695800 (or 695798 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 13915820 is about 3730.3914003761. The cubic root of 13915820 is about 240.5301936063.

The spelling of 13915820 in words is "thirteen million, nine hundred fifteen thousand, eight hundred twenty".