18828840 has 128 divisors (see below), whose sum is σ = 59875200. Its totient is φ = 4730880.

The previous prime is 18828827. The next prime is 18828841. The reversal of 18828840 is 4882881.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18828841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211516 + ... + 211604.

It is an arithmetic number, because the mean of its divisors is an integer number (467775).

Almost surely, 2^18828840 is an apocalyptic number.

18828840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18828840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29937600).

18828840 is an abundant number, since it is smaller than the sum of its proper divisors (41046360).

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

18828840 is a wasteful number, since it uses less digits than its factorization.

18828840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 18828840 is about 4339.2211282671. The cubic root of 18828840 is about 266.0364771805.

The spelling of 18828840 in words is "eighteen million, eight hundred twenty-eight thousand, eight hundred forty".