245040636 has 12 divisors (see below), whose sum is σ = 571761512. Its totient is φ = 81680208.

The previous prime is 245040623. The next prime is 245040637. The reversal of 245040636 is 636040542.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245040637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10210015 + ... + 10210038.

Almost surely, 2^245040636 is an apocalyptic number.

It is an amenable number.

245040636 is an abundant number, since it is smaller than the sum of its proper divisors (326720876).

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

245040636 is a wasteful number, since it uses less digits than its factorization.

245040636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20420060 (or 20420058 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 245040636 is about 15653.7738580829. The cubic root of 245040636 is about 625.7670675733.

The spelling of 245040636 in words is "two hundred forty-five million, forty thousand, six hundred thirty-six".