1865534464 has 44 divisors (see below), whose sum is σ = 3736168024. Its totient is φ = 931037184.

The previous prime is 1865534449. The next prime is 1865534497. The reversal of 1865534464 is 4644355681.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 687799 + ... + 690505.

Almost surely, 2^1865534464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1865534464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1868084012).

1865534464 is an abundant number, since it is smaller than the sum of its proper divisors (1870633560).

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

1865534464 is an equidigital number, since it uses as much as digits as its factorization.

1865534464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400 (or 3382 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 46.

The square root of 1865534464 is about 43191.8333021417. The cubic root of 1865534464 is about 1231.0275116413.

The spelling of 1865534464 in words is "one billion, eight hundred sixty-five million, five hundred thirty-four thousand, four hundred sixty-four".