1866850036 has 12 divisors (see below), whose sum is σ = 3459163428. Its totient is φ = 878517632.

The previous prime is 1866850033. The next prime is 1866850049. The reversal of 1866850036 is 6300586681.

It can be written as a sum of positive squares in 2 ways, for example, as 967210000 + 899640036 = 31100^2 + 29994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1866849974 and 1866850001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866850033) 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, 13726771 + ... + 13726906.

It is an arithmetic number, because the mean of its divisors is an integer number (288263619).

Almost surely, 2^1866850036 is an apocalyptic number.

It is an amenable number.

1866850036 is a deficient number, since it is larger than the sum of its proper divisors (1592313392).

1866850036 is a wasteful number, since it uses less digits than its factorization.

1866850036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27453698 (or 27453696 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1866850036 is about 43207.0600249543. The cubic root of 1866850036 is about 1231.3168165411.

The spelling of 1866850036 in words is "one billion, eight hundred sixty-six million, eight hundred fifty thousand, thirty-six".