245557728 has 72 divisors (see below), whose sum is σ = 752032008. Its totient is φ = 75555072.

The previous prime is 245557721. The next prime is 245557759. The reversal of 245557728 is 827755542.

245557728 is a `hidden beast` number, since 2 + 4 + 55 + 577 + 28 = 666.

245557728 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245557721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29050 + ... + 36537.

It is an arithmetic number, because the mean of its divisors is an integer number (10444889).

Almost surely, 2^245557728 is an apocalyptic number.

It is an amenable number.

245557728 is an abundant number, since it is smaller than the sum of its proper divisors (506474280).

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

245557728 is a wasteful number, since it uses less digits than its factorization.

245557728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65616 (or 65605 counting only the distinct ones).

The product of its digits is 784000, while the sum is 45.

The square root of 245557728 is about 15670.2816822162. The cubic root of 245557728 is about 626.2069290421.

The spelling of 245557728 in words is "two hundred forty-five million, five hundred fifty-seven thousand, seven hundred twenty-eight".