13628556 has 18 divisors (see below), whose sum is σ = 34450052. Its totient is φ = 4542840.

The previous prime is 13628551. The next prime is 13628557. The reversal of 13628556 is 65582631.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 378571 = 13628556 / (1 + 3 + 6 + 2 + 8 + 5 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 13628556.

It is not an unprimeable number, because it can be changed into a prime (13628551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 189250 + ... + 189321.

Almost surely, 2^13628556 is an apocalyptic number.

It is an amenable number.

13628556 is an abundant number, since it is smaller than the sum of its proper divisors (20821496).

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

13628556 is a wasteful number, since it uses less digits than its factorization.

13628556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378581 (or 378576 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 13628556 is about 3691.6874190538. The cubic root of 13628556 is about 238.8635858383.

The spelling of 13628556 in words is "thirteen million, six hundred twenty-eight thousand, five hundred fifty-six".