13699840 has 144 divisors (see below), whose sum is σ = 41207040. Its totient is φ = 4239360.

The previous prime is 13699793. The next prime is 13699853. The reversal of 13699840 is 4899631.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 13699793 and 13699802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98491 + ... + 98629.

It is an arithmetic number, because the mean of its divisors is an integer number (286160).

Almost surely, 2^13699840 is an apocalyptic number.

13699840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13699840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20603520).

13699840 is an abundant number, since it is smaller than the sum of its proper divisors (27507200).

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

13699840 is a wasteful number, since it uses less digits than its factorization.

13699840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 13699840 is about 3701.3294908722. The cubic root of 13699840 is about 239.2793195631.

The spelling of 13699840 in words is "thirteen million, six hundred ninety-nine thousand, eight hundred forty".