18628456 has 32 divisors (see below), whose sum is σ = 43548480. Its totient is φ = 7257600.

The previous prime is 18628451. The next prime is 18628499. The reversal of 18628456 is 65482681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18628451) 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, 14505 + ... + 15736.

It is an arithmetic number, because the mean of its divisors is an integer number (1360890).

Almost surely, 2^18628456 is an apocalyptic number.

It is an amenable number.

18628456 is an abundant number, since it is smaller than the sum of its proper divisors (24920024).

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

18628456 is a wasteful number, since it uses less digits than its factorization.

18628456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30265 (or 30261 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 18628456 is about 4316.0695082447. The cubic root of 18628456 is about 265.0893539903.

The spelling of 18628456 in words is "eighteen million, six hundred twenty-eight thousand, four hundred fifty-six".