1866273044 has 12 divisors (see below), whose sum is σ = 3354247764. Its totient is φ = 907916544.

The previous prime is 1866273041. The next prime is 1866273161. The reversal of 1866273044 is 4403726681.

It can be written as a sum of positive squares in 2 ways, for example, as 1550784400 + 315488644 = 39380^2 + 17762^2 .

It is a super-2 number, since 2×1866273044² = 6965950149522051872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1866272992 and 1866273010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866273041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6304829 + ... + 6305124.

It is an arithmetic number, because the mean of its divisors is an integer number (279520647).

Almost surely, 2^1866273044 is an apocalyptic number.

It is an amenable number.

1866273044 is a deficient number, since it is larger than the sum of its proper divisors (1487974720).

1866273044 is a wasteful number, since it uses less digits than its factorization.

1866273044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12609994 (or 12609992 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 1866273044 is about 43200.3824520108. The cubic root of 1866273044 is about 1231.1899480825.

The spelling of 1866273044 in words is "one billion, eight hundred sixty-six million, two hundred seventy-three thousand, forty-four".