245649904 has 10 divisors (see below), whose sum is σ = 475946720. Its totient is φ = 122824944.

The previous prime is 245649883. The next prime is 245649931. The reversal of 245649904 is 409946542.

It is a congruent number.

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, 7676544 + ... + 7676575.

It is an arithmetic number, because the mean of its divisors is an integer number (47594672).

Almost surely, 2^245649904 is an apocalyptic number.

It is an amenable number.

245649904 is a deficient number, since it is larger than the sum of its proper divisors (230296816).

245649904 is a wasteful number, since it uses less digits than its factorization.

245649904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15353127 (or 15353121 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 245649904 is about 15673.2225148500. Note that the first 3 decimals coincide. The cubic root of 245649904 is about 626.2852731848.

The spelling of 245649904 in words is "two hundred forty-five million, six hundred forty-nine thousand, nine hundred four".