1897964289384 has 64 divisors (see below), whose sum is σ = 5007224308800. Its totient is φ = 597847371264.

The previous prime is 1897964289323. The next prime is 1897964289421. The reversal of 1897964289384 is 4839824697981.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5061037 + ... + 5423100.

It is an arithmetic number, because the mean of its divisors is an integer number (78237879825).

Almost surely, 2^{1897964289384} is an apocalyptic number.

It is an amenable number.

1897964289384 is an abundant number, since it is smaller than the sum of its proper divisors (3109260019416).

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

1897964289384 is a wasteful number, since it uses less digits than its factorization.

1897964289384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10484562 (or 10484558 counting only the distinct ones).

The product of its digits is 1504935936, while the sum is 78.

The spelling of 1897964289384 in words is "one trillion, eight hundred ninety-seven billion, nine hundred sixty-four million, two hundred eighty-nine thousand, three hundred eighty-four".