1897718396 has 24 divisors (see below), whose sum is σ = 3796679040. Its totient is φ = 813041712.

The previous prime is 1897718377. The next prime is 1897718399. The reversal of 1897718396 is 6938177981.

It is a super-2 number, since 2×1897718396² = 7202670221033625632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897718399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93191 + ... + 111713.

It is an arithmetic number, because the mean of its divisors is an integer number (158194960).

Almost surely, 2^1897718396 is an apocalyptic number.

It is an amenable number.

1897718396 is an abundant number, since it is smaller than the sum of its proper divisors (1898960644).

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

1897718396 is a wasteful number, since it uses less digits than its factorization.

1897718396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22193 (or 22191 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 59.

The square root of 1897718396 is about 43562.8097808211. The cubic root of 1897718396 is about 1238.0663575811.

It can be divided in two parts, 18977 and 18396, that added together give a palindrome (37373).

The spelling of 1897718396 in words is "one billion, eight hundred ninety-seven million, seven hundred eighteen thousand, three hundred ninety-six".