1865773056 has 208 divisors, whose sum is σ = 5766464000. Its totient is φ = 525533184.

The previous prime is 1865773051. The next prime is 1865773057. The reversal of 1865773056 is 6503775681.

It is a super-2 number, since 2×1865773056² = 6962218192991158272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1865772996 and 1865773014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1865773051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9375645 + ... + 9375843.

Almost surely, 2^1865773056 is an apocalyptic number.

1865773056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1865773056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2883232000).

1865773056 is an abundant number, since it is smaller than the sum of its proper divisors (3900690944).

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

1865773056 is a wasteful number, since it uses less digits than its factorization.

1865773056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 48.

The square root of 1865773056 is about 43194.5952174575. The cubic root of 1865773056 is about 1231.0799900420.

The spelling of 1865773056 in words is "one billion, eight hundred sixty-five million, seven hundred seventy-three thousand, fifty-six".