13851816 has 64 divisors (see below), whose sum is σ = 38361600. Its totient is φ = 4132800.

The previous prime is 13851797. The next prime is 13851833. The reversal of 13851816 is 61815831.

13851816 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 (33).

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, 18375 + ... + 19113.

It is an arithmetic number, because the mean of its divisors is an integer number (599400).

Almost surely, 2^13851816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13851816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19180800).

13851816 is an abundant number, since it is smaller than the sum of its proper divisors (24509784).

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

13851816 is a wasteful number, since it uses less digits than its factorization.

13851816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830 (or 826 counting only the distinct ones).

The product of its digits is 5760, while the sum is 33.

The square root of 13851816 is about 3721.8027889720. The cubic root of 13851816 is about 240.1608643759.

The spelling of 13851816 in words is "thirteen million, eight hundred fifty-one thousand, eight hundred sixteen".