3815987766 has 12 divisors (see below), whose sum is σ = 7632278172. Its totient is φ = 1271945484.

The previous prime is 3815987737. The next prime is 3815987789. The reversal of 3815987766 is 6677895183.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138705 + ... + 163923.

It is an arithmetic number, because the mean of its divisors is an integer number (636023181).

Almost surely, 2^3815987766 is an apocalyptic number.

3815987766 is an abundant number, since it is smaller than the sum of its proper divisors (3816290406).

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

3815987766 is an frugal number, since it uses more digits than its factorization.

3815987766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50443 (or 25224 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 60.

The square root of 3815987766 is about 61773.6818232490. The cubic root of 3815987766 is about 1562.6761764527.

The spelling of 3815987766 in words is "three billion, eight hundred fifteen million, nine hundred eighty-seven thousand, seven hundred sixty-six".