1604667838 has 16 divisors (see below), whose sum is σ = 2534988240. Its totient is φ = 759715200.

The previous prime is 1604667833. The next prime is 1604667839. The reversal of 1604667838 is 8387664061.

It is a junction number, because it is equal to n+sod(n) for n = 1604667791 and 1604667800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604667833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72348 + ... + 91888.

It is an arithmetic number, because the mean of its divisors is an integer number (158436765).

Almost surely, 2^1604667838 is an apocalyptic number.

1604667838 is a deficient number, since it is larger than the sum of its proper divisors (930320402).

1604667838 is a wasteful number, since it uses less digits than its factorization.

1604667838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21723.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 1604667838 is about 40058.3054808862. The cubic root of 1604667838 is about 1170.7433944139.

The spelling of 1604667838 in words is "one billion, six hundred four million, six hundred sixty-seven thousand, eight hundred thirty-eight".