13778974 has 8 divisors (see below), whose sum is σ = 22547448. Its totient is φ = 6263160.

The previous prime is 13778957. The next prime is 13778983. The reversal of 13778974 is 47987731.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313137 + ... + 313180.

It is an arithmetic number, because the mean of its divisors is an integer number (2818431).

Almost surely, 2^13778974 is an apocalyptic number.

13778974 is a deficient number, since it is larger than the sum of its proper divisors (8768474).

13778974 is a wasteful number, since it uses less digits than its factorization.

13778974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626330.

The product of its digits is 296352, while the sum is 46.

The square root of 13778974 is about 3712.0040409461. The cubic root of 13778974 is about 239.7391494606.

The spelling of 13778974 in words is "thirteen million, seven hundred seventy-eight thousand, nine hundred seventy-four".