3939984 has 30 divisors (see below), whose sum is σ = 11026886. Its totient is φ = 1313280.

The previous prime is 3939959. The next prime is 3939989. The reversal of 3939984 is 4899393.

It can be written as a sum of positive squares in only one way, i.e., 3504384 + 435600 = 1872^2 + 660^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (3939989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13537 + ... + 13824.

Almost surely, 2^3939984 is an apocalyptic number.

It is an amenable number.

3939984 is an abundant number, since it is smaller than the sum of its proper divisors (7086902).

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

3939984 is a wasteful number, since it uses less digits than its factorization.

3939984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27375 (or 27366 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 3939984 is about 1984.9392937821. The cubic root of 3939984 is about 157.9421889658.

The spelling of 3939984 in words is "three million, nine hundred thirty-nine thousand, nine hundred eighty-four".