18950728 has 16 divisors (see below), whose sum is σ = 35671680. Its totient is φ = 9438288.

The previous prime is 18950719. The next prime is 18950747. The reversal of 18950728 is 82705981.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2400 + ... + 6607.

It is an arithmetic number, because the mean of its divisors is an integer number (2229480).

Almost surely, 2^18950728 is an apocalyptic number.

It is an amenable number.

18950728 is a deficient number, since it is larger than the sum of its proper divisors (16720952).

18950728 is a wasteful number, since it uses less digits than its factorization.

18950728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9276 (or 9272 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 18950728 is about 4353.2433885553. The cubic root of 18950728 is about 266.6093029389.

The spelling of 18950728 in words is "eighteen million, nine hundred fifty thousand, seven hundred twenty-eight".