13940399 has 8 divisors (see below), whose sum is σ = 15278592. Its totient is φ = 12614040.

The previous prime is 13940393. The next prime is 13940411. The reversal of 13940399 is 99304931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13940399 - 2⁴ = 13940383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13940393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389 + ... + 5294.

It is an arithmetic number, because the mean of its divisors is an integer number (1909824).

Almost surely, 2^13940399 is an apocalyptic number.

13940399 is a deficient number, since it is larger than the sum of its proper divisors (1338193).

13940399 is a wasteful number, since it uses less digits than its factorization.

13940399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5917.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 13940399 is about 3733.6843733771. The cubic root of 13940399 is about 240.6717235181.

The spelling of 13940399 in words is "thirteen million, nine hundred forty thousand, three hundred ninety-nine".