1806386736 has 240 divisors, whose sum is σ = 5920232192. Its totient is φ = 464555520.

The previous prime is 1806386711. The next prime is 1806386759. The reversal of 1806386736 is 6376836081.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6382851 + ... + 6383133.

Almost surely, 2^1806386736 is an apocalyptic number.

1806386736 is a gapful number since it is divisible by the number (16) 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 1806386736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2960116096).

1806386736 is an abundant number, since it is smaller than the sum of its proper divisors (4113845456).

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

1806386736 is a wasteful number, since it uses less digits than its factorization.

1806386736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 1806386736 is about 42501.6086283802. The cubic root of 1806386736 is about 1217.8774200479.

The spelling of 1806386736 in words is "one billion, eight hundred six million, three hundred eighty-six thousand, seven hundred thirty-six".