265820430 has 64 divisors (see below), whose sum is σ = 669523968. Its totient is φ = 67415040.

The previous prime is 265820417. The next prime is 265820447. The reversal of 265820430 is 34028562.

265820430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130782 + ... + 132798.

It is an arithmetic number, because the mean of its divisors is an integer number (10461312).

Almost surely, 2^265820430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265820430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334761984).

265820430 is an abundant number, since it is smaller than the sum of its proper divisors (403703538).

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

265820430 is a wasteful number, since it uses less digits than its factorization.

265820430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 265820430 is about 16304.0004293425. Note that the first 3 decimals coincide. The cubic root of 265820430 is about 642.9780078212.

Adding to 265820430 its reverse (34028562), we get a palindrome (299848992).

The spelling of 265820430 in words is "two hundred sixty-five million, eight hundred twenty thousand, four hundred thirty".