13628780 has 24 divisors (see below), whose sum is σ = 31222800. Its totient is φ = 4955840.

The previous prime is 13628773. The next prime is 13628801. The reversal of 13628780 is 8782631.

It is a self number, because there is not a number n which added to its sum of digits gives 13628780.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30755 + ... + 31194.

It is an arithmetic number, because the mean of its divisors is an integer number (1300950).

Almost surely, 2^13628780 is an apocalyptic number.

13628780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13628780 is an abundant number, since it is smaller than the sum of its proper divisors (17594020).

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

13628780 is a wasteful number, since it uses less digits than its factorization.

13628780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61969 (or 61967 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 13628780 is about 3691.7177573590. The cubic root of 13628780 is about 238.8648944913.

The spelling of 13628780 in words is "thirteen million, six hundred twenty-eight thousand, seven hundred eighty".