18436628 has 24 divisors (see below), whose sum is σ = 37205952. Its totient is φ = 7830144.

The previous prime is 18436609. The next prime is 18436651. The reversal of 18436628 is 82663481.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18436591 and 18436600.

It is a congruent number.

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, 251 + ... + 6077.

It is an arithmetic number, because the mean of its divisors is an integer number (1550248).

Almost surely, 2^18436628 is an apocalyptic number.

It is an amenable number.

18436628 is an abundant number, since it is smaller than the sum of its proper divisors (18769324).

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

18436628 is a wasteful number, since it uses less digits than its factorization.

18436628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5951 (or 5949 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 18436628 is about 4293.7894685231. The cubic root of 18436628 is about 264.1762864517.

The spelling of 18436628 in words is "eighteen million, four hundred thirty-six thousand, six hundred twenty-eight".