1897481445 has 32 divisors (see below), whose sum is σ = 3083598720. Its totient is φ = 996230400.

The previous prime is 1897481431. The next prime is 1897481497. The reversal of 1897481445 is 5441847981.

It is not a de Polignac number, because 1897481445 - 2⁵ = 1897481413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267687 + ... + 274683.

It is an arithmetic number, because the mean of its divisors is an integer number (96362460).

Almost surely, 2^1897481445 is an apocalyptic number.

1897481445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1897481445 is a deficient number, since it is larger than the sum of its proper divisors (1186117275).

1897481445 is a wasteful number, since it uses less digits than its factorization.

1897481445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7285.

The product of its digits is 1290240, while the sum is 51.

The square root of 1897481445 is about 43560.0900481163. The cubic root of 1897481445 is about 1238.0148267055.

The spelling of 1897481445 in words is "one billion, eight hundred ninety-seven million, four hundred eighty-one thousand, four hundred forty-five".