265720404 has 48 divisors (see below), whose sum is σ = 662352768. Its totient is φ = 82618368.

The previous prime is 265720369. The next prime is 265720451. The reversal of 265720404 is 404027562.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17289 + ... + 28815.

It is an arithmetic number, because the mean of its divisors is an integer number (13799016).

Almost surely, 2^265720404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265720404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331176384).

265720404 is an abundant number, since it is smaller than the sum of its proper divisors (396632364).

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

265720404 is a wasteful number, since it uses less digits than its factorization.

265720404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11664 (or 11662 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 265720404 is about 16300.9326113569. The cubic root of 265720404 is about 642.8973486247.

Adding to 265720404 its reverse (404027562), we get a palindrome (669747966).

The spelling of 265720404 in words is "two hundred sixty-five million, seven hundred twenty thousand, four hundred four".