1863481920 has 112 divisors (see below), whose sum is σ = 6107509248. Its totient is φ = 480890880.

The previous prime is 1863481849. The next prime is 1863481931. The reversal of 1863481920 is 291843681.

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, 1549 + ... + 61068.

Almost surely, 2^1863481920 is an apocalyptic number.

1863481920 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 1863481920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3053754624).

1863481920 is an abundant number, since it is smaller than the sum of its proper divisors (4244027328).

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

1863481920 is a wasteful number, since it uses less digits than its factorization.

1863481920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62668 (or 62658 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1863481920 is about 43168.0659747457. The cubic root of 1863481920 is about 1230.5758688860.

The spelling of 1863481920 in words is "one billion, eight hundred sixty-three million, four hundred eighty-one thousand, nine hundred twenty".