3843680638 has 64 divisors (see below), whose sum is σ = 7056691200. Its totient is φ = 1567490400.

The previous prime is 3843680597. The next prime is 3843680641. The reversal of 3843680638 is 8360863483.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 3843680591 and 3843680600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1295745 + ... + 1298707.

It is an arithmetic number, because the mean of its divisors is an integer number (110260800).

Almost surely, 2^3843680638 is an apocalyptic number.

3843680638 is a deficient number, since it is larger than the sum of its proper divisors (3213010562).

3843680638 is a wasteful number, since it uses less digits than its factorization.

3843680638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078 (or 3064 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 49.

The square root of 3843680638 is about 61997.4244465042. The cubic root of 3843680638 is about 1566.4472165132.

The spelling of 3843680638 in words is "three billion, eight hundred forty-three million, six hundred eighty thousand, six hundred thirty-eight".