265813820 has 24 divisors (see below), whose sum is σ = 563740128. Its totient is φ = 105272000.

The previous prime is 265813813. The next prime is 265813843. The reversal of 265813820 is 28318562.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63776 + ... + 67815.

It is an arithmetic number, because the mean of its divisors is an integer number (23489172).

Almost surely, 2^265813820 is an apocalyptic number.

265813820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265813820 is an abundant number, since it is smaller than the sum of its proper divisors (297926308).

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

265813820 is a wasteful number, since it uses less digits than its factorization.

265813820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131701 (or 131699 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 265813820 is about 16303.7977170965. The cubic root of 265813820 is about 642.9726782586.

The spelling of 265813820 in words is "two hundred sixty-five million, eight hundred thirteen thousand, eight hundred twenty".