13972278 has 8 divisors (see below), whose sum is σ = 27944568. Its totient is φ = 4657424.

The previous prime is 13972271. The next prime is 13972279. The reversal of 13972278 is 87227931.

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

13972278 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13972271) by changing a digit.

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, 1164351 + ... + 1164362.

It is an arithmetic number, because the mean of its divisors is an integer number (3493071).

Almost surely, 2^13972278 is an apocalyptic number.

13972278 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.

13972278 is a wasteful number, since it uses less digits than its factorization.

13972278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328718.

The product of its digits is 42336, while the sum is 39.

The square root of 13972278 is about 3737.9510430181. The cubic root of 13972278 is about 240.8550404346.

The spelling of 13972278 in words is "thirteen million, nine hundred seventy-two thousand, two hundred seventy-eight".