1897689696 has 48 divisors (see below), whose sum is σ = 5693071104. Its totient is φ = 542196864.

The previous prime is 1897689691. The next prime is 1897689697. The reversal of 1897689696 is 6969867981.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1897689696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897689691) 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, 1411300 + ... + 1412643.

It is an arithmetic number, because the mean of its divisors is an integer number (118605648).

Almost surely, 2^1897689696 is an apocalyptic number.

1897689696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1897689696 is an abundant number, since it is smaller than the sum of its proper divisors (3795381408).

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

1897689696 is a wasteful number, since it uses less digits than its factorization.

1897689696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823963 (or 2823955 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 69.

The square root of 1897689696 is about 43562.4803701534. The cubic root of 1897689696 is about 1238.0601162822.

The spelling of 1897689696 in words is "one billion, eight hundred ninety-seven million, six hundred eighty-nine thousand, six hundred ninety-six".