13916640 has 96 divisors (see below), whose sum is σ = 44513280. Its totient is φ = 3654144.

The previous prime is 13916629. The next prime is 13916641. The reversal of 13916640 is 4661931.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a junction number, because it is equal to n+sod(n) for n = 13916598 and 13916607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13916641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37737 + ... + 38103.

It is an arithmetic number, because the mean of its divisors is an integer number (463680).

Almost surely, 2^13916640 is an apocalyptic number.

13916640 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 13916640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22256640).

13916640 is an abundant number, since it is smaller than the sum of its proper divisors (30596640).

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

13916640 is a wasteful number, since it uses less digits than its factorization.

13916640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 13916640 is about 3730.5013067951. The cubic root of 13916640 is about 240.5349179868.

The spelling of 13916640 in words is "thirteen million, nine hundred sixteen thousand, six hundred forty".