13864890 has 64 divisors (see below), whose sum is σ = 36400896. Its totient is φ = 3359232.

The previous prime is 13864867. The next prime is 13864891. The reversal of 13864890 is 9846831.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13864891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28227 + ... + 28713.

It is an arithmetic number, because the mean of its divisors is an integer number (568764).

Almost surely, 2^13864890 is an apocalyptic number.

13864890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13864890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18200448).

13864890 is an abundant number, since it is smaller than the sum of its proper divisors (22536006).

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

13864890 is a wasteful number, since it uses less digits than its factorization.

13864890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 13864890 is about 3723.5587815959. The cubic root of 13864890 is about 240.2363990159.

The spelling of 13864890 in words is "thirteen million, eight hundred sixty-four thousand, eight hundred ninety".