245784 has 96 divisors (see below), whose sum is σ = 820800. Its totient is φ = 60480.

The previous prime is 245783. The next prime is 245789. The reversal of 245784 is 487542.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12927 + ... + 12945.

It is an arithmetic number, because the mean of its divisors is an integer number (8550).

2²⁴⁵⁷⁸⁴ is an apocalyptic number.

245784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410400).

245784 is an abundant number, since it is smaller than the sum of its proper divisors (575016).

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

245784 is a wasteful number, since it uses less digits than its factorization.

245784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53 (or 42 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 245784 is about 495.7660738695. The cubic root of 245784 is about 62.6399211859.

The spelling of 245784 in words is "two hundred forty-five thousand, seven hundred eighty-four".