3938390834 has 16 divisors (see below), whose sum is σ = 6813470400. Its totient is φ = 1672395984.

The previous prime is 3938390821. The next prime is 3938390839. The reversal of 3938390834 is 4380938393.

It is a super-2 number, since 2×3938390834² = 31021844722670431112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3938390839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288904 + ... + 1291955.

It is an arithmetic number, because the mean of its divisors is an integer number (425841900).

Almost surely, 2^3938390834 is an apocalyptic number.

3938390834 is a deficient number, since it is larger than the sum of its proper divisors (2875079566).

3938390834 is a wasteful number, since it uses less digits than its factorization.

3938390834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580977.

The product of its (nonzero) digits is 1679616, while the sum is 50.

The square root of 3938390834 is about 62756.5999238327. The cubic root of 3938390834 is about 1579.2089767388.

The spelling of 3938390834 in words is "three billion, nine hundred thirty-eight million, three hundred ninety thousand, eight hundred thirty-four".