1868997442 has 16 divisors (see below), whose sum is σ = 3196747512. Its totient is φ = 811872000.

The previous prime is 1868997433. The next prime is 1868997461. The reversal of 1868997442 is 2447998681.

It can be written as a sum of positive squares in 4 ways, for example, as 1855972561 + 13024881 = 43081^2 + 3609^2 .

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, 2113809 + ... + 2114692.

Almost surely, 2^1868997442 is an apocalyptic number.

1868997442 is a deficient number, since it is larger than the sum of its proper divisors (1327750070).

1868997442 is a wasteful number, since it uses less digits than its factorization.

1868997442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228533.

The product of its digits is 6967296, while the sum is 58.

The square root of 1868997442 is about 43231.9030578114. The cubic root of 1868997442 is about 1231.7887565972.

The spelling of 1868997442 in words is "one billion, eight hundred sixty-eight million, nine hundred ninety-seven thousand, four hundred forty-two".