245000640 has 56 divisors (see below), whose sum is σ = 777880080. Its totient is φ = 65333248.

The previous prime is 245000603. The next prime is 245000659. The reversal of 245000640 is 46000542.

It is a happy number.

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 in 7 ways as a sum of consecutive naturals, for example, 126645 + ... + 128564.

Almost surely, 2^245000640 is an apocalyptic number.

245000640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245000640 is an abundant number, since it is smaller than the sum of its proper divisors (532879440).

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

245000640 is a wasteful number, since it uses less digits than its factorization.

245000640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255229 (or 255219 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 245000640 is about 15652.4962865353. The cubic root of 245000640 is about 625.7330194226.

The spelling of 245000640 in words is "two hundred forty-five million, six hundred forty", and thus it is an aban number.