265261620 has 48 divisors (see below), whose sum is σ = 799868160. Its totient is φ = 65294976.

The previous prime is 265261597. The next prime is 265261639. The reversal of 265261620 is 26162562.

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 15 ways as a sum of consecutive naturals, for example, 169260 + ... + 170819.

It is an arithmetic number, because the mean of its divisors is an integer number (16663920).

Almost surely, 2^265261620 is an apocalyptic number.

265261620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265261620 is an abundant number, since it is smaller than the sum of its proper divisors (534606540).

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

265261620 is a wasteful number, since it uses less digits than its factorization.

265261620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340104 (or 340102 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 265261620 is about 16286.8542082257. The cubic root of 265261620 is about 642.5271337590.

The spelling of 265261620 in words is "two hundred sixty-five million, two hundred sixty-one thousand, six hundred twenty".