1806968920 has 64 divisors (see below), whose sum is σ = 4236364800. Its totient is φ = 692883840.

The previous prime is 1806968873. The next prime is 1806968921. The reversal of 1806968920 is 298696081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806968921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125871 + ... + 139489.

It is an arithmetic number, because the mean of its divisors is an integer number (66193200).

Almost surely, 2^1806968920 is an apocalyptic number.

1806968920 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 1806968920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2118182400).

1806968920 is an abundant number, since it is smaller than the sum of its proper divisors (2429395880).

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

1806968920 is a wasteful number, since it uses less digits than its factorization.

1806968920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13768 (or 13764 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 1806968920 is about 42508.4570409230. The cubic root of 1806968920 is about 1218.0082433790.

The spelling of 1806968920 in words is "one billion, eight hundred six million, nine hundred sixty-eight thousand, nine hundred twenty".