13278428 has 12 divisors (see below), whose sum is σ = 24604272. Its totient is φ = 6248640.

The previous prime is 13278413. The next prime is 13278439. The reversal of 13278428 is 82487231.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 97568 + ... + 97703.

It is an arithmetic number, because the mean of its divisors is an integer number (2050356).

Almost surely, 2^13278428 is an apocalyptic number.

It is an amenable number.

13278428 is a deficient number, since it is larger than the sum of its proper divisors (11325844).

13278428 is a wasteful number, since it uses less digits than its factorization.

13278428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195292 (or 195290 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 13278428 is about 3643.9577385036. The cubic root of 13278428 is about 236.8002851454.

The spelling of 13278428 in words is "thirteen million, two hundred seventy-eight thousand, four hundred twenty-eight".