3784757816 has 64 divisors (see below), whose sum is σ = 8215879680. Its totient is φ = 1601026560.

The previous prime is 3784757813. The next prime is 3784757819. The reversal of 3784757816 is 6187574873.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3784757813) and next prime (3784757819).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3784757813) 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, 1713785 + ... + 1715991.

It is an arithmetic number, because the mean of its divisors is an integer number (128373120).

Almost surely, 2^3784757816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3784757816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4107939840).

3784757816 is an abundant number, since it is smaller than the sum of its proper divisors (4431121864).

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

3784757816 is a wasteful number, since it uses less digits than its factorization.

3784757816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604 (or 2600 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 56.

The square root of 3784757816 is about 61520.3853694042. The cubic root of 3784757816 is about 1558.4015261518.

The spelling of 3784757816 in words is "three billion, seven hundred eighty-four million, seven hundred fifty-seven thousand, eight hundred sixteen".