245297280 has 128 divisors (see below), whose sum is σ = 786542400. Its totient is φ = 65024000.

The previous prime is 245297263. The next prime is 245297347. The reversal of 245297280 is 82792542.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481666 + ... + 482174.

Almost surely, 2^245297280 is an apocalyptic number.

245297280 is a gapful number since it is divisible by the number (20) 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 245297280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393271200).

245297280 is an abundant number, since it is smaller than the sum of its proper divisors (541245120).

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

245297280 is a wasteful number, since it uses less digits than its factorization.

245297280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 245297280 is about 15661.9692248453. The cubic root of 245297280 is about 625.9854576472.

The spelling of 245297280 in words is "two hundred forty-five million, two hundred ninety-seven thousand, two hundred eighty".