1865371056 has 40 divisors (see below), whose sum is σ = 5072502720. Its totient is φ = 589064256.

The previous prime is 1865371051. The next prime is 1865371061. The reversal of 1865371056 is 6501735681.

It is an interprime number because it is at equal distance from previous prime (1865371051) and next prime (1865371061).

It is a junction number, because it is equal to n+sod(n) for n = 1865370999 and 1865371017.

It is not an unprimeable number, because it can be changed into a prime (1865371051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021770 + ... + 1023593.

It is an arithmetic number, because the mean of its divisors is an integer number (126812568).

Almost surely, 2^1865371056 is an apocalyptic number.

1865371056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1865371056 is an abundant number, since it is smaller than the sum of its proper divisors (3207131664).

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

1865371056 is a wasteful number, since it uses less digits than its factorization.

1865371056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045393 (or 2045387 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 1865371056 is about 43189.9416068140. The cubic root of 1865371056 is about 1230.9915674081.

The spelling of 1865371056 in words is "one billion, eight hundred sixty-five million, three hundred seventy-one thousand, fifty-six".