1866412804 has 9 divisors (see below), whose sum is σ = 3266373621. Its totient is φ = 933163200.

The previous prime is 1866412789. The next prime is 1866412819. The reversal of 1866412804 is 4082146681.

The square root of 1866412804 is 43202.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1866412789) and next prime (1866412819).

It can be written as a sum of positive squares in only one way, i.e., 1672646404 + 193766400 = 40898^2 + 13920^2 .

It is a Duffinian number.

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 2 ways as a sum of consecutive naturals, for example, 75604 + ... + 97204.

Almost surely, 2^1866412804 is an apocalyptic number.

1866412804 is the 43202-nd square number.

It is an amenable number.

1866412804 is a deficient number, since it is larger than the sum of its proper divisors (1399960817).

1866412804 is an frugal number, since it uses more digits than its factorization.

1866412804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43206 (or 21603 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The cubic root of 1866412804 is about 1231.2206807795.

The spelling of 1866412804 in words is "one billion, eight hundred sixty-six million, four hundred twelve thousand, eight hundred four".