245638836 has 36 divisors (see below), whose sum is σ = 624405600. Its totient is φ = 81420048.

The previous prime is 245638807. The next prime is 245638847. The reversal of 245638836 is 638836542.

It is a happy number.

245638836 is a `hidden beast` number, since 2 + 4 + 5 + 638 + 8 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 245638791 and 245638800.

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 11 ways as a sum of consecutive naturals, for example, 12616 + ... + 25503.

It is an arithmetic number, because the mean of its divisors is an integer number (17344600).

Almost surely, 2^245638836 is an apocalyptic number.

It is an amenable number.

245638836 is an abundant number, since it is smaller than the sum of its proper divisors (378766764).

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

245638836 is a wasteful number, since it uses less digits than its factorization.

245638836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38308 (or 38303 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 245638836 is about 15672.8694245821. The cubic root of 245638836 is about 626.2758670755.

The spelling of 245638836 in words is "two hundred forty-five million, six hundred thirty-eight thousand, eight hundred thirty-six".