13278620 has 24 divisors (see below), whose sum is σ = 28413504. Its totient is φ = 5210816.

The previous prime is 13278619. The next prime is 13278623. The reversal of 13278620 is 2687231.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13278623) 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 7 ways as a sum of consecutive naturals, for example, 5204 + ... + 7323.

It is an arithmetic number, because the mean of its divisors is an integer number (1183896).

Almost surely, 2^13278620 is an apocalyptic number.

13278620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13278620 is an abundant number, since it is smaller than the sum of its proper divisors (15134884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13278620 is a wasteful number, since it uses less digits than its factorization.

13278620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12589 (or 12587 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 13278620 is about 3643.9840833900. The cubic root of 13278620 is about 236.8014264812.

The spelling of 13278620 in words is "thirteen million, two hundred seventy-eight thousand, six hundred twenty".