839490804 has 120 divisors (see below), whose sum is σ = 2339773128. Its totient is φ = 261550080.

The previous prime is 839490803. The next prime is 839490887. The reversal of 839490804 is 408094938.

It is a happy number.

839490804 is a `hidden beast` number, since 83 + 9 + 490 + 80 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 270668304 + 568822500 = 16452^2 + 23850^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 839490804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839490803) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 952444 + ... + 953324.

Almost surely, 2^839490804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 839490804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169886564).

839490804 is an abundant number, since it is smaller than the sum of its proper divisors (1500282324).

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

839490804 is a wasteful number, since it uses less digits than its factorization.

839490804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 839490804 is about 28973.9676951570. The cubic root of 839490804 is about 943.3481042802.

The spelling of 839490804 in words is "eight hundred thirty-nine million, four hundred ninety thousand, eight hundred four".