3821917642 has 4 divisors (see below), whose sum is σ = 5732876466. Its totient is φ = 1910958820.

The previous prime is 3821917597. The next prime is 3821917643. The reversal of 3821917642 is 2467191283.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3452855121 + 369062521 = 58761^2 + 19211^2 .

It is not an unprimeable number, because it can be changed into a prime (3821917643) by changing a digit.

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 as a sum of consecutive naturals, namely, 955479409 + ... + 955479412.

Almost surely, 2^3821917642 is an apocalyptic number.

3821917642 is a deficient number, since it is larger than the sum of its proper divisors (1910958824).

3821917642 is a wasteful number, since it uses less digits than its factorization.

3821917642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910958823.

The product of its digits is 145152, while the sum is 43.

The square root of 3821917642 is about 61821.6599744782. The cubic root of 3821917642 is about 1563.4852007267.

The spelling of 3821917642 in words is "three billion, eight hundred twenty-one million, nine hundred seventeen thousand, six hundred forty-two".