264985644 has 216 divisors, whose sum is σ = 830362624. Its totient is φ = 64310400.

The previous prime is 264985639. The next prime is 264985709. The reversal of 264985644 is 446589462.

It is a junction number, because it is equal to n+sod(n) for n = 264985593 and 264985602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8547909 + ... + 8547939.

Almost surely, 2^264985644 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 264985644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415181312).

264985644 is an abundant number, since it is smaller than the sum of its proper divisors (565376980).

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

264985644 is a wasteful number, since it uses less digits than its factorization.

264985644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 83 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 48.

The square root of 264985644 is about 16278.3796490928. The cubic root of 264985644 is about 642.3042297964.

The spelling of 264985644 in words is "two hundred sixty-four million, nine hundred eighty-five thousand, six hundred forty-four".