3939898 has 4 divisors (see below), whose sum is σ = 5909850. Its totient is φ = 1969948.

The previous prime is 3939851. The next prime is 3939899. The reversal of 3939898 is 8989393.

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., 2647129 + 1292769 = 1627^2 + 1137^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3939899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984973 + ... + 984976.

Almost surely, 2^3939898 is an apocalyptic number.

3939898 is a deficient number, since it is larger than the sum of its proper divisors (1969952).

3939898 is a wasteful number, since it uses less digits than its factorization.

3939898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969951.

The product of its digits is 419904, while the sum is 49.

The square root of 3939898 is about 1984.9176305328. The cubic root of 3939898 is about 157.9410397965.

The spelling of 3939898 in words is "three million, nine hundred thirty-nine thousand, eight hundred ninety-eight".