245257856 has 32 divisors (see below), whose sum is σ = 495499680. Its totient is φ = 120897280.

The previous prime is 245257849. The next prime is 245257877. The reversal of 245257856 is 658752542.

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 4406 + ... + 22581.

It is an arithmetic number, because the mean of its divisors is an integer number (15484365).

Almost surely, 2^245257856 is an apocalyptic number.

It is an amenable number.

245257856 is an abundant number, since it is smaller than the sum of its proper divisors (250241824).

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

245257856 is an equidigital number, since it uses as much as digits as its factorization.

245257856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27072 (or 27060 counting only the distinct ones).

The product of its digits is 672000, while the sum is 44.

The square root of 245257856 is about 15660.7105841338. The cubic root of 245257856 is about 625.9519198749.

The spelling of 245257856 in words is "two hundred forty-five million, two hundred fifty-seven thousand, eight hundred fifty-six".