13906840 has 16 divisors (see below), whose sum is σ = 31290480. Its totient is φ = 5562720.

The previous prime is 13906819. The next prime is 13906843. The reversal of 13906840 is 4860931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13906843) 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 3 ways as a sum of consecutive naturals, for example, 173796 + ... + 173875.

It is an arithmetic number, because the mean of its divisors is an integer number (1955655).

Almost surely, 2^13906840 is an apocalyptic number.

13906840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13906840 is an abundant number, since it is smaller than the sum of its proper divisors (17383640).

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

13906840 is a wasteful number, since it uses less digits than its factorization.

13906840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347682 (or 347678 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 13906840 is about 3729.1875790848. The cubic root of 13906840 is about 240.4784437293.

The spelling of 13906840 in words is "thirteen million, nine hundred six thousand, eight hundred forty".