1806099840 has 192 divisors, whose sum is σ = 6508326240. Its totient is φ = 460652544.

The previous prime is 1806099829. The next prime is 1806099847. The reversal of 1806099840 is 489906081.

It is a tau number, because it is divible by the number of its divisors (192).

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 (1806099847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125664 + ... + 139296.

Almost surely, 2^1806099840 is an apocalyptic number.

1806099840 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 1806099840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3254163120).

1806099840 is an abundant number, since it is smaller than the sum of its proper divisors (4702226400).

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

1806099840 is a wasteful number, since it uses less digits than its factorization.

1806099840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13681 (or 13666 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 1806099840 is about 42498.2333750475. The cubic root of 1806099840 is about 1217.8129409319.

The spelling of 1806099840 in words is "one billion, eight hundred six million, ninety-nine thousand, eight hundred forty".