18952728 has 64 divisors (see below), whose sum is σ = 50544000. Its totient is φ = 5905152.

The previous prime is 18952697. The next prime is 18952741. The reversal of 18952728 is 82725981.

It is a self number, because there is not a number n which added to its sum of digits gives 18952728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40351 + ... + 40817.

It is an arithmetic number, because the mean of its divisors is an integer number (789750).

Almost surely, 2^18952728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18952728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25272000).

18952728 is an abundant number, since it is smaller than the sum of its proper divisors (31591272).

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

18952728 is a wasteful number, since it uses less digits than its factorization.

18952728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 580 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 18952728 is about 4353.4730962761. The cubic root of 18952728 is about 266.6186816437.

The spelling of 18952728 in words is "eighteen million, nine hundred fifty-two thousand, seven hundred twenty-eight".