245644 has 24 divisors (see below), whose sum is σ = 508928. Its totient is φ = 101520.

The previous prime is 245639. The next prime is 245653. The reversal of 245644 is 446542.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727 + ... + 1009.

2²⁴⁵⁶⁴⁴ 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 245644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254464).

245644 is an abundant number, since it is smaller than the sum of its proper divisors (263284).

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

245644 is a wasteful number, since it uses less digits than its factorization.

245644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 323 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 245644 is about 495.6248581336. The cubic root of 245644 is about 62.6280255722.

It can be divided in two parts, 2456 and 44, that added together give a square (2500 = 50²).

The spelling of 245644 in words is "two hundred forty-five thousand, six hundred forty-four".