13978342 has 16 divisors (see below), whose sum is σ = 25005312. Its totient is φ = 5730120.

The previous prime is 13978337. The next prime is 13978421. The reversal of 13978342 is 24387931.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 21384 + ... + 22027.

It is an arithmetic number, because the mean of its divisors is an integer number (1562832).

Almost surely, 2^13978342 is an apocalyptic number.

13978342 is a deficient number, since it is larger than the sum of its proper divisors (11026970).

13978342 is a wasteful number, since it uses less digits than its factorization.

13978342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43443.

The product of its digits is 36288, while the sum is 37.

The square root of 13978342 is about 3738.7620945976. The cubic root of 13978342 is about 240.8898792710.

It can be divided in two parts, 13 and 978342, that multiplied together give a triangular number (12718446 = T₅₀₄₃).

The spelling of 13978342 in words is "thirteen million, nine hundred seventy-eight thousand, three hundred forty-two".