13890642 has 8 divisors (see below), whose sum is σ = 27781296. Its totient is φ = 4630212.

The previous prime is 13890637. The next prime is 13890661. The reversal of 13890642 is 24609831.

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

13890642 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157548 + ... + 1157559.

It is an arithmetic number, because the mean of its divisors is an integer number (3472662).

Almost surely, 2^13890642 is an apocalyptic number.

13890642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13890642 is a wasteful number, since it uses less digits than its factorization.

13890642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315112.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 13890642 is about 3727.0151596150. The cubic root of 13890642 is about 240.3850416541.

The spelling of 13890642 in words is "thirteen million, eight hundred ninety thousand, six hundred forty-two".