1604881604 has 12 divisors (see below), whose sum is σ = 2873858064. Its totient is φ = 783779304.

The previous prime is 1604881571. The next prime is 1604881613. The reversal of 1604881604 is 4061884061.

It is a super-2 number, since 2×1604881604² = 5151289925715225632, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4665182 + ... + 4665525.

It is an arithmetic number, because the mean of its divisors is an integer number (239488172).

Almost surely, 2^1604881604 is an apocalyptic number.

It is an amenable number.

1604881604 is a deficient number, since it is larger than the sum of its proper divisors (1268976460).

1604881604 is a wasteful number, since it uses less digits than its factorization.

1604881604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9330754 (or 9330752 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 1604881604 is about 40060.9735777852. The cubic root of 1604881604 is about 1170.7953790083.

The spelling of 1604881604 in words is "one billion, six hundred four million, eight hundred eighty-one thousand, six hundred four".