13861020 has 24 divisors (see below), whose sum is σ = 38811024. Its totient is φ = 3696256.

The previous prime is 13860997. The next prime is 13861049. The reversal of 13861020 is 2016831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115449 + ... + 115568.

It is an arithmetic number, because the mean of its divisors is an integer number (1617126).

Almost surely, 2^13861020 is an apocalyptic number.

13861020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13861020 is an abundant number, since it is smaller than the sum of its proper divisors (24950004).

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

13861020 is a wasteful number, since it uses less digits than its factorization.

13861020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231029 (or 231027 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 13861020 is about 3723.0390811809. The cubic root of 13861020 is about 240.2140451572.

Adding to 13861020 its reverse (2016831), we get a palindrome (15877851).

The spelling of 13861020 in words is "thirteen million, eight hundred sixty-one thousand, twenty".