2535890644 has 72 divisors (see below), whose sum is σ = 5316569664. Its totient is φ = 1036540800.

The previous prime is 2535890641. The next prime is 2535890653. The reversal of 2535890644 is 4460985352.

It is a junction number, because it is equal to n+sod(n) for n = 2535890594 and 2535890603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2535890641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1963639 + ... + 1964929.

Almost surely, 2^2535890644 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 2535890644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2658284832).

2535890644 is an abundant number, since it is smaller than the sum of its proper divisors (2780679020).

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

2535890644 is a wasteful number, since it uses less digits than its factorization.

2535890644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The square root of 2535890644 is about 50357.6274659559. The cubic root of 2535890644 is about 1363.6727865240.

The spelling of 2535890644 in words is "two billion, five hundred thirty-five million, eight hundred ninety thousand, six hundred forty-four".