1858246866 has 96 divisors (see below), whose sum is σ = 4933998720. Its totient is φ = 507789216.

The previous prime is 1858246847. The next prime is 1858246867. The reversal of 1858246866 is 6686428581.

1858246866 is a `hidden beast` number, since 18 + 582 + 46 + 8 + 6 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1858246867) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 195316 + ... + 204608.

It is an arithmetic number, because the mean of its divisors is an integer number (51395820).

Almost surely, 2^1858246866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1858246866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2466999360).

1858246866 is an abundant number, since it is smaller than the sum of its proper divisors (3075751854).

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

1858246866 is a wasteful number, since it uses less digits than its factorization.

1858246866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9357 (or 9328 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 54.

The square root of 1858246866 is about 43107.3876035187. The cubic root of 1858246866 is about 1229.4224415153.

The spelling of 1858246866 in words is "one billion, eight hundred fifty-eight million, two hundred forty-six thousand, eight hundred sixty-six".