245270728 has 8 divisors (see below), whose sum is σ = 459882630. Its totient is φ = 122635360.

The previous prime is 245270699. The next prime is 245270731. The reversal of 245270728 is 827072542.

It can be written as a sum of positive squares in only one way, i.e., 208571364 + 36699364 = 14442^2 + 6058^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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 as a sum of consecutive naturals, namely, 15329413 + ... + 15329428.

Almost surely, 2^245270728 is an apocalyptic number.

It is an amenable number.

245270728 is a deficient number, since it is larger than the sum of its proper divisors (214611902).

245270728 is a wasteful number, since it uses less digits than its factorization.

245270728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30658847 (or 30658843 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 245270728 is about 15661.1215434911. The cubic root of 245270728 is about 625.9628704072.

The spelling of 245270728 in words is "two hundred forty-five million, two hundred seventy thousand, seven hundred twenty-eight".