3994439490 has 48 divisors (see below), whose sum is σ = 10402519608. Its totient is φ = 1063442688.

The previous prime is 3994439479. The next prime is 3994439503. The reversal of 3994439490 is 949344993.

3994439490 is a `hidden beast` number, since 39 + 94 + 4 + 39 + 490 = 666.

3994439490 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 745781481 + 3248658009 = 27309^2 + 56997^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19564 + ... + 91496.

Almost surely, 2^3994439490 is an apocalyptic number.

3994439490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3994439490 is an abundant number, since it is smaller than the sum of its proper divisors (6408080118).

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

3994439490 is a wasteful number, since it uses less digits than its factorization.

3994439490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72563 (or 72560 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 54.

The square root of 3994439490 is about 63201.5782239653. The cubic root of 3994439490 is about 1586.6651475772.

The spelling of 3994439490 in words is "three billion, nine hundred ninety-four million, four hundred thirty-nine thousand, four hundred ninety".