1897381268 has 24 divisors (see below), whose sum is σ = 3499984320. Its totient is φ = 897523200.

The previous prime is 1897381259. The next prime is 1897381301. The reversal of 1897381268 is 8621837981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39668 + ... + 73268.

It is an arithmetic number, because the mean of its divisors is an integer number (145832680).

Almost surely, 2^1897381268 is an apocalyptic number.

It is an amenable number.

1897381268 is a deficient number, since it is larger than the sum of its proper divisors (1602603052).

1897381268 is a wasteful number, since it uses less digits than its factorization.

1897381268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34367 (or 34365 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 53.

The square root of 1897381268 is about 43558.9401615788. The cubic root of 1897381268 is about 1237.9930394404.

The spelling of 1897381268 in words is "one billion, eight hundred ninety-seven million, three hundred eighty-one thousand, two hundred sixty-eight".