1856744946 has 72 divisors (see below), whose sum is σ = 4686546384. Its totient is φ = 529729200.

The previous prime is 1856744909. The next prime is 1856744959. The reversal of 1856744946 is 6494476581.

1856744946 is a `hidden beast` number, since 1 + 85 + 6 + 74 + 494 + 6 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1856744892 and 1856744901.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 925981 + ... + 927983.

It is an arithmetic number, because the mean of its divisors is an integer number (65090922).

Almost surely, 2^1856744946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1856744946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2343273192).

1856744946 is an abundant number, since it is smaller than the sum of its proper divisors (2829801438).

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

1856744946 is a wasteful number, since it uses less digits than its factorization.

1856744946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076 (or 3066 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 1856744946 is about 43089.9634021659. The cubic root of 1856744946 is about 1229.0911271127.

The spelling of 1856744946 in words is "one billion, eight hundred fifty-six million, seven hundred forty-four thousand, nine hundred forty-six".