39641839820 has 24 divisors (see below), whose sum is σ = 90815851728. Its totient is φ = 14415214400.

The previous prime is 39641839813. The next prime is 39641839823. The reversal of 39641839820 is 2893814693.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (39641839823) 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 in 7 ways as a sum of consecutive naturals, for example, 90094871 + ... + 90095310.

It is an arithmetic number, because the mean of its divisors is an integer number (3783993822).

Almost surely, 2^39641839820 is an apocalyptic number.

It is an amenable number.

39641839820 is an abundant number, since it is smaller than the sum of its proper divisors (51174011908).

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

39641839820 is a wasteful number, since it uses less digits than its factorization.

39641839820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180190201 (or 180190199 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 53.

The spelling of 39641839820 in words is "thirty-nine billion, six hundred forty-one million, eight hundred thirty-nine thousand, eight hundred twenty".