1608865404 has 24 divisors (see below), whose sum is σ = 3875117568. Its totient is φ = 518988720.

The previous prime is 1608865399. The next prime is 1608865409. The reversal of 1608865404 is 4045688061.

It is an interprime number because it is at equal distance from previous prime (1608865399) and next prime (1608865409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608865409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2162082 + ... + 2162825.

It is an arithmetic number, because the mean of its divisors is an integer number (161463232).

Almost surely, 2^1608865404 is an apocalyptic number.

It is an amenable number.

1608865404 is an abundant number, since it is smaller than the sum of its proper divisors (2266252164).

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

1608865404 is a wasteful number, since it uses less digits than its factorization.

1608865404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324945 (or 4324943 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 1608865404 is about 40110.6644671963. The cubic root of 1608865404 is about 1171.7633342360.

The spelling of 1608865404 in words is "one billion, six hundred eight million, eight hundred sixty-five thousand, four hundred four".