1897543242 has 48 divisors (see below), whose sum is σ = 4705234560. Its totient is φ = 541398816.

The previous prime is 1897543237. The next prime is 1897543313. The reversal of 1897543242 is 2423457981.

1897543242 is a `hidden beast` number, since 1 + 89 + 7 + 543 + 24 + 2 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83484 + ... + 103752.

It is an arithmetic number, because the mean of its divisors is an integer number (98025720).

Almost surely, 2^1897543242 is an apocalyptic number.

1897543242 is an abundant number, since it is smaller than the sum of its proper divisors (2807691318).

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

1897543242 is a wasteful number, since it uses less digits than its factorization.

1897543242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21027 (or 21024 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 1897543242 is about 43560.7993728306. The cubic root of 1897543242 is about 1238.0282664103.

The spelling of 1897543242 in words is "one billion, eight hundred ninety-seven million, five hundred forty-three thousand, two hundred forty-two".