1866788042 has 16 divisors (see below), whose sum is σ = 3201120960. Its totient is φ = 799823808.

The previous prime is 1866788023. The next prime is 1866788051. The reversal of 1866788042 is 2408876681.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37634 + ... + 71762.

It is an arithmetic number, because the mean of its divisors is an integer number (200070060).

Almost surely, 2^1866788042 is an apocalyptic number.

1866788042 is a deficient number, since it is larger than the sum of its proper divisors (1334332918).

1866788042 is a wasteful number, since it uses less digits than its factorization.

1866788042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38045.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The square root of 1866788042 is about 43206.3426130933. The cubic root of 1866788042 is about 1231.3031866122.

The spelling of 1866788042 in words is "one billion, eight hundred sixty-six million, seven hundred eighty-eight thousand, forty-two".