1604597868 has 18 divisors (see below), whose sum is σ = 4056066924. Its totient is φ = 534865944.

The previous prime is 1604597867. The next prime is 1604597879. The reversal of 1604597868 is 8687954061.

1604597868 is a `hidden beast` number, since 1 + 60 + 459 + 78 + 68 = 666.

1604597868 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (1604597867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22286046 + ... + 22286117.

Almost surely, 2^1604597868 is an apocalyptic number.

1604597868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1604597868 is an abundant number, since it is smaller than the sum of its proper divisors (2451469056).

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

1604597868 is a wasteful number, since it uses less digits than its factorization.

1604597868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44572173 (or 44572168 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 1604597868 is about 40057.4321193958. The cubic root of 1604597868 is about 1170.7263777861.

It can be divided in two parts, 160 and 4597868, that added together give a triangular number (4598028 = T₃₀₃₂).

The spelling of 1604597868 in words is "one billion, six hundred four million, five hundred ninety-seven thousand, eight hundred sixty-eight".