13900408 has 8 divisors (see below), whose sum is σ = 26063280. Its totient is φ = 6950200.

The previous prime is 13900387. The next prime is 13900409. The reversal of 13900408 is 80400931.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13900409) 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 as a sum of consecutive naturals, namely, 868768 + ... + 868783.

It is an arithmetic number, because the mean of its divisors is an integer number (3257910).

Almost surely, 2^13900408 is an apocalyptic number.

It is an amenable number.

13900408 is a deficient number, since it is larger than the sum of its proper divisors (12162872).

13900408 is a wasteful number, since it uses less digits than its factorization.

13900408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737557 (or 1737553 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 13900408 is about 3728.3250931216. The cubic root of 13900408 is about 240.4413637535.

The spelling of 13900408 in words is "thirteen million, nine hundred thousand, four hundred eight".