1604989868 has 6 divisors (see below), whose sum is σ = 2808732276. Its totient is φ = 802494932.

The previous prime is 1604989853. The next prime is 1604989909. The reversal of 1604989868 is 8689894061.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200623730 + ... + 200623737.

It is an arithmetic number, because the mean of its divisors is an integer number (468122046).

Almost surely, 2^1604989868 is an apocalyptic number.

It is an amenable number.

1604989868 is a deficient number, since it is larger than the sum of its proper divisors (1203742408).

1604989868 is a wasteful number, since it uses less digits than its factorization.

1604989868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401247471 (or 401247469 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 59.

The square root of 1604989868 is about 40062.3247952487. The cubic root of 1604989868 is about 1170.8217053825.

The spelling of 1604989868 in words is "one billion, six hundred four million, nine hundred eighty-nine thousand, eight hundred sixty-eight".