1868305280 has 128 divisors (see below), whose sum is σ = 4729903200. Its totient is φ = 704471040.

The previous prime is 1868305267. The next prime is 1868305379. The reversal of 1868305280 is 825038681.

It is a tau number, because it is divible by the number of its divisors (128).

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, 796910 + ... + 799250.

Almost surely, 2^1868305280 is an apocalyptic number.

1868305280 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 1868305280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2364951600).

1868305280 is an abundant number, since it is smaller than the sum of its proper divisors (2861597920).

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

1868305280 is a wasteful number, since it uses less digits than its factorization.

1868305280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432 (or 2420 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 1868305280 is about 43223.8970940844. The cubic root of 1868305280 is about 1231.6366781581.

The spelling of 1868305280 in words is "one billion, eight hundred sixty-eight million, three hundred five thousand, two hundred eighty".