245443904 has 14 divisors (see below), whose sum is σ = 487052874. Its totient is φ = 122721920.

The previous prime is 245443897. The next prime is 245443927. The reversal of 245443904 is 409344542.

It can be written as a sum of positive squares in only one way, i.e., 229825600 + 15618304 = 15160^2 + 3952^2 .

It is a super-2 number, since 2×245443904² = 120485420021522432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1917467 + ... + 1917594.

It is an arithmetic number, because the mean of its divisors is an integer number (34789491).

Almost surely, 2^245443904 is an apocalyptic number.

It is an amenable number.

245443904 is a deficient number, since it is larger than the sum of its proper divisors (241608970).

245443904 is an equidigital number, since it uses as much as digits as its factorization.

245443904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835073 (or 3835063 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 245443904 is about 15666.6494184302. The cubic root of 245443904 is about 626.1101583234.

The spelling of 245443904 in words is "two hundred forty-five million, four hundred forty-three thousand, nine hundred four".