245844640 has 48 divisors (see below), whose sum is σ = 590352840. Its totient is φ = 96721920.

The previous prime is 245844637. The next prime is 245844659. The reversal of 245844640 is 46448542.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 195888016 + 49956624 = 13996^2 + 7068^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 245844640.

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 7 ways as a sum of consecutive naturals, for example, 2835 + ... + 22354.

Almost surely, 2^245844640 is an apocalyptic number.

245844640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245844640 is an abundant number, since it is smaller than the sum of its proper divisors (344508200).

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

245844640 is a wasteful number, since it uses less digits than its factorization.

245844640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25265 (or 25257 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 37.

The square root of 245844640 is about 15679.4336632418. The cubic root of 245844640 is about 626.4507228398.

The spelling of 245844640 in words is "two hundred forty-five million, eight hundred forty-four thousand, six hundred forty".