1894397568 has 64 divisors (see below), whose sum is σ = 5750857920. Its totient is φ = 541255680.

The previous prime is 1894397563. The next prime is 1894397581. The reversal of 1894397568 is 8657934981.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (1894397563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349693 + ... + 355068.

It is an arithmetic number, because the mean of its divisors is an integer number (89857155).

Almost surely, 2^1894397568 is an apocalyptic number.

It is an amenable number.

1894397568 is an abundant number, since it is smaller than the sum of its proper divisors (3856460352).

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

1894397568 is an equidigital number, since it uses as much as digits as its factorization.

1894397568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704785 (or 704773 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The square root of 1894397568 is about 43524.6776897888. The cubic root of 1894397568 is about 1237.3437695232.

The spelling of 1894397568 in words is "one billion, eight hundred ninety-four million, three hundred ninety-seven thousand, five hundred sixty-eight".