3819778506 has 64 divisors (see below), whose sum is σ = 8964633600. Its totient is φ = 1202266800.

The previous prime is 3819778499. The next prime is 3819778507. The reversal of 3819778506 is 6058779183.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (3819778507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 313101 + ... + 325071.

It is an arithmetic number, because the mean of its divisors is an integer number (140072400).

Almost surely, 2^3819778506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3819778506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4482316800).

3819778506 is an abundant number, since it is smaller than the sum of its proper divisors (5144855094).

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

3819778506 is a wasteful number, since it uses less digits than its factorization.

3819778506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12312 (or 12306 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The square root of 3819778506 is about 61804.3566910942. The cubic root of 3819778506 is about 1563.1934508809.

The spelling of 3819778506 in words is "three billion, eight hundred nineteen million, seven hundred seventy-eight thousand, five hundred six".