245811930 has 192 divisors, whose sum is σ = 779103360. Its totient is φ = 49061376.

The previous prime is 245811919. The next prime is 245811947. The reversal of 245811930 is 39118542.

It is a junction number, because it is equal to n+sod(n) for n = 245811891 and 245811900.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 362752 + ... + 363428.

It is an arithmetic number, because the mean of its divisors is an integer number (4057830).

Almost surely, 2^245811930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245811930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389551680).

245811930 is an abundant number, since it is smaller than the sum of its proper divisors (533291430).

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

245811930 is a wasteful number, since it uses less digits than its factorization.

245811930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 245811930 is about 15678.3905423994. The cubic root of 245811930 is about 626.4229382031.

It can be divided in two parts, 245 and 811930, that added together give a triangular number (812175 = T₁₂₇₄).

The spelling of 245811930 in words is "two hundred forty-five million, eight hundred eleven thousand, nine hundred thirty".