13783278 has 8 divisors (see below), whose sum is σ = 27566568. Its totient is φ = 4594424.

The previous prime is 13783271. The next prime is 13783309. The reversal of 13783278 is 87238731.

13783278 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

13783278 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13783271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148601 + ... + 1148612.

It is an arithmetic number, because the mean of its divisors is an integer number (3445821).

Almost surely, 2^13783278 is an apocalyptic number.

13783278 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.

13783278 is a wasteful number, since it uses less digits than its factorization.

13783278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297218.

The product of its digits is 56448, while the sum is 39.

The square root of 13783278 is about 3712.5837364294. The cubic root of 13783278 is about 239.7641085004.

It can be divided in two parts, 1378 and 3278, that added together give a triangular number (4656 = T₉₆).

The spelling of 13783278 in words is "thirteen million, seven hundred eighty-three thousand, two hundred seventy-eight".