245639744 has 168 divisors, whose sum is σ = 610682040. Its totient is φ = 97542144.

The previous prime is 245639729. The next prime is 245639819. The reversal of 245639744 is 447936542.

245639744 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 93857344 + 151782400 = 9688^2 + 12320^2 .

It is a junction number, because it is equal to n+sod(n) for n = 245639695 and 245639704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3364892 + ... + 3364964.

Almost surely, 2^245639744 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 245639744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305341020).

245639744 is an abundant number, since it is smaller than the sum of its proper divisors (365042296).

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

245639744 is a wasteful number, since it uses less digits than its factorization.

245639744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 148 counting only the distinct ones).

The product of its digits is 725760, while the sum is 44.

The square root of 245639744 is about 15672.8983918100. The cubic root of 245639744 is about 626.2766387474.

The spelling of 245639744 in words is "two hundred forty-five million, six hundred thirty-nine thousand, seven hundred forty-four".