245663928 has 80 divisors (see below), whose sum is σ = 690629280. Its totient is φ = 81585792.

The previous prime is 245663903. The next prime is 245663947. The reversal of 245663928 is 829366542.

245663928 is a `hidden beast` number, since 2 + 4 + 5 + 6 + 639 + 2 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 237300 + ... + 238332.

It is an arithmetic number, because the mean of its divisors is an integer number (8632866).

Almost surely, 2^245663928 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 245663928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345314640).

245663928 is an abundant number, since it is smaller than the sum of its proper divisors (444965352).

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

245663928 is a wasteful number, since it uses less digits than its factorization.

245663928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418 (or 1405 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 245663928 is about 15673.6698957200. The cubic root of 245663928 is about 626.2971910367.

The spelling of 245663928 in words is "two hundred forty-five million, six hundred sixty-three thousand, nine hundred twenty-eight".