3939930 has 24 divisors (see below), whose sum is σ = 10244052. Its totient is φ = 1050624.

The previous prime is 3939919. The next prime is 3939931. The reversal of 3939930 is 399393.

It can be written as a sum of positive squares in 2 ways, for example, as 3381921 + 558009 = 1839^2 + 747^2 .

It is not an unprimeable number, because it can be changed into a prime (3939931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21799 + ... + 21978.

Almost surely, 2^3939930 is an apocalyptic number.

3939930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3939930 is an abundant number, since it is smaller than the sum of its proper divisors (6304122).

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

3939930 is a wasteful number, since it uses less digits than its factorization.

3939930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43790 (or 43787 counting only the distinct ones).

The product of its (nonzero) digits is 19683, while the sum is 36.

The square root of 3939930 is about 1984.9256913043. The cubic root of 3939930 is about 157.9414673963.

The spelling of 3939930 in words is "three million, nine hundred thirty-nine thousand, nine hundred thirty".