13289278 has 8 divisors (see below), whose sum is σ = 20271960. Its totient is φ = 6531960.

The previous prime is 13289233. The next prime is 13289281. The reversal of 13289278 is 87298231.

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

It is a super-2 number, since 2×13289278² = 353209819522568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13289278.

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, 56193 + ... + 56428.

It is an arithmetic number, because the mean of its divisors is an integer number (2533995).

Almost surely, 2^13289278 is an apocalyptic number.

13289278 is a deficient number, since it is larger than the sum of its proper divisors (6982682).

13289278 is a wasteful number, since it uses less digits than its factorization.

13289278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112682.

The product of its digits is 48384, while the sum is 40.

The square root of 13289278 is about 3645.4462003985. The cubic root of 13289278 is about 236.8647652584.

The spelling of 13289278 in words is "thirteen million, two hundred eighty-nine thousand, two hundred seventy-eight".