245813688 has 24 divisors (see below), whose sum is σ = 665745600. Its totient is φ = 81937872.

The previous prime is 245813683. The next prime is 245813717. The reversal of 245813688 is 886318542.

245813688 is a `hidden beast` number, since 2 + 4 + 581 + 3 + 68 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×245813688² = 120848738416322688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245813683) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1706968 + ... + 1707111.

It is an arithmetic number, because the mean of its divisors is an integer number (27739400).

Almost surely, 2^245813688 is an apocalyptic number.

It is an amenable number.

245813688 is an abundant number, since it is smaller than the sum of its proper divisors (419931912).

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

245813688 is a wasteful number, since it uses less digits than its factorization.

245813688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3414091 (or 3414084 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 245813688 is about 15678.4466067273. The cubic root of 245813688 is about 626.4244315520.

The spelling of 245813688 in words is "two hundred forty-five million, eight hundred thirteen thousand, six hundred eighty-eight".