245188820 has 12 divisors (see below), whose sum is σ = 514896564. Its totient is φ = 98075520.

The previous prime is 245188813. The next prime is 245188847. The reversal of 245188820 is 28881542.

245188820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 168065296 + 77123524 = 12964^2 + 8782^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6129701 + ... + 6129740.

It is an arithmetic number, because the mean of its divisors is an integer number (42908047).

Almost surely, 2^245188820 is an apocalyptic number.

245188820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245188820 is an abundant number, since it is smaller than the sum of its proper divisors (269707744).

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

245188820 is a wasteful number, since it uses less digits than its factorization.

245188820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12259450 (or 12259448 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 245188820 is about 15658.5063144605. The cubic root of 245188820 is about 625.8931826848.

The spelling of 245188820 in words is "two hundred forty-five million, one hundred eighty-eight thousand, eight hundred twenty".