18028707840 has 1200 divisors, whose sum is σ = 79930509120. Its totient is φ = 3822059520.

The previous prime is 18028707833. The next prime is 18028707841. The reversal of 18028707840 is 4870782081.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18028707841) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 948879351 + ... + 948879369.

Almost surely, 2^18028707840 is an apocalyptic number.

18028707840 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 18028707840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39965254560).

18028707840 is an abundant number, since it is smaller than the sum of its proper divisors (61901801280).

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

18028707840 is a wasteful number, since it uses less digits than its factorization.

18028707840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The spelling of 18028707840 in words is "eighteen billion, twenty-eight million, seven hundred seven thousand, eight hundred forty".