13890810 has 32 divisors (see below), whose sum is σ = 33436800. Its totient is φ = 3693248.

The previous prime is 13890791. The next prime is 13890817. The reversal of 13890810 is 1809831.

It is a super-2 number, since 2×13890810² = 385909204912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (13890817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17584 + ... + 18356.

It is an arithmetic number, because the mean of its divisors is an integer number (1044900).

Almost surely, 2^13890810 is an apocalyptic number.

13890810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13890810 is an abundant number, since it is smaller than the sum of its proper divisors (19545990).

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

13890810 is a wasteful number, since it uses less digits than its factorization.

13890810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 13890810 is about 3727.0376976897. The cubic root of 13890810 is about 240.3860107603.

The spelling of 13890810 in words is "thirteen million, eight hundred ninety thousand, eight hundred ten".