3784861387 has 16 divisors (see below), whose sum is σ = 4027747680. Its totient is φ = 3551738112.

The previous prime is 3784861349. The next prime is 3784861429. The reversal of 3784861387 is 7831684873.

3784861387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3784861387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3784861687) 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, 99343 + ... + 132055.

It is an arithmetic number, because the mean of its divisors is an integer number (251734230).

Almost surely, 2^3784861387 is an apocalyptic number.

3784861387 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

3784861387 is a deficient number, since it is larger than the sum of its proper divisors (242886293).

3784861387 is a wasteful number, since it uses less digits than its factorization.

3784861387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32862.

The product of its digits is 5419008, while the sum is 55.

The square root of 3784861387 is about 61521.2271252777. The cubic root of 3784861387 is about 1558.4157413927.

It can be divided in two parts, 37848 and 61387, that added together give a triangular number (99235 = T₄₄₅).

The spelling of 3784861387 in words is "three billion, seven hundred eighty-four million, eight hundred sixty-one thousand, three hundred eighty-seven".