3934721902838 has 8 divisors (see below), whose sum is σ = 5973192286488. Its totient is φ = 1943657807344.

The previous prime is 3934721902831. The next prime is 3934721902861. The reversal of 3934721902838 is 8382091274393.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3934721902831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11851571831 + ... + 11851572162.

It is an arithmetic number, because the mean of its divisors is an integer number (746649035811).

Almost surely, 2^{3934721902838} is an apocalyptic number.

3934721902838 is a deficient number, since it is larger than the sum of its proper divisors (2038470383650).

3934721902838 is a wasteful number, since it uses less digits than its factorization.

3934721902838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23703144078.

The product of its (nonzero) digits is 15676416, while the sum is 59.

The spelling of 3934721902838 in words is "three trillion, nine hundred thirty-four billion, seven hundred twenty-one million, nine hundred two thousand, eight hundred thirty-eight".