1897949872 has 40 divisors (see below), whose sum is σ = 4525883936. Its totient is φ = 750836736.

The previous prime is 1897949869. The next prime is 1897949899. The reversal of 1897949872 is 2789497981.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650313 + ... + 653224.

Almost surely, 2^1897949872 is an apocalyptic number.

It is an amenable number.

1897949872 is an abundant number, since it is smaller than the sum of its proper divisors (2627934064).

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

1897949872 is a wasteful number, since it uses less digits than its factorization.

1897949872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303565 (or 1303559 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 64.

The square root of 1897949872 is about 43565.4665073152. The cubic root of 1897949872 is about 1238.1166936404.

The spelling of 1897949872 in words is "one billion, eight hundred ninety-seven million, nine hundred forty-nine thousand, eight hundred seventy-two".