1995660404 has 24 divisors (see below), whose sum is σ = 3700960200. Its totient is φ = 939921920.

The previous prime is 1995660397. The next prime is 1995660431. The reversal of 1995660404 is 4040665991.

It can be written as a sum of positive squares in 4 ways, for example, as 193488100 + 1802172304 = 13910^2 + 42452^2 .

It is a congruent number.

It is an unprimeable number.

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, 205049 + ... + 214560.

It is an arithmetic number, because the mean of its divisors is an integer number (154206675).

Almost surely, 2^1995660404 is an apocalyptic number.

It is an amenable number.

1995660404 is a deficient number, since it is larger than the sum of its proper divisors (1705299796).

1995660404 is a wasteful number, since it uses less digits than its factorization.

1995660404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419683 (or 419681 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 1995660404 is about 44672.8150444988. The cubic root of 1995660404 is about 1259.0091319592.

The spelling of 1995660404 in words is "one billion, nine hundred ninety-five million, six hundred sixty thousand, four hundred four".