1866897642 has 16 divisors (see below), whose sum is σ = 3775749120. Its totient is φ = 615306912.

The previous prime is 1866897629. The next prime is 1866897671. The reversal of 1866897642 is 2467986681.

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, 1747498 + ... + 1748565.

It is an arithmetic number, because the mean of its divisors is an integer number (235984320).

Almost surely, 2^1866897642 is an apocalyptic number.

1866897642 is an abundant number, since it is smaller than the sum of its proper divisors (1908851478).

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

1866897642 is a wasteful number, since it uses less digits than its factorization.

1866897642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3496157.

The product of its digits is 6967296, while the sum is 57.

The square root of 1866897642 is about 43207.6109267800. The cubic root of 1866897642 is about 1231.3272829362.

The spelling of 1866897642 in words is "one billion, eight hundred sixty-six million, eight hundred ninety-seven thousand, six hundred forty-two".