4392139408 has 40 divisors (see below), whose sum is σ = 8963265600. Its totient is φ = 2079183744.

The previous prime is 4392139403. The next prime is 4392139421. The reversal of 4392139408 is 8049312934.

It is not an unprimeable number, because it can be changed into a prime (4392139403) 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, 625485 + ... + 632467.

It is an arithmetic number, because the mean of its divisors is an integer number (224081640).

Almost surely, 2^4392139408 is an apocalyptic number.

It is an amenable number.

4392139408 is an abundant number, since it is smaller than the sum of its proper divisors (4571126192).

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

4392139408 is a wasteful number, since it uses less digits than its factorization.

4392139408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9079 (or 9073 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 4392139408 is about 66273.2178787178. The cubic root of 4392139408 is about 1637.6661488891. Note that the first 3 decimals are identical.

The spelling of 4392139408 in words is "four billion, three hundred ninety-two million, one hundred thirty-nine thousand, four hundred eight".