265995090 has 192 divisors, whose sum is σ = 781208064. Its totient is φ = 64862208.

The previous prime is 265995077. The next prime is 265995091. The reversal of 265995090 is 90599562.

265995090 is a `hidden beast` number, since 2 + 6 + 599 + 50 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (265995091) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1941502 + ... + 1941638.

It is an arithmetic number, because the mean of its divisors is an integer number (4068792).

Almost surely, 2^265995090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265995090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390604032).

265995090 is an abundant number, since it is smaller than the sum of its proper divisors (515212974).

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

265995090 is a wasteful number, since it uses less digits than its factorization.

265995090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 265995090 is about 16309.3559038976. The cubic root of 265995090 is about 643.1188020550.

The spelling of 265995090 in words is "two hundred sixty-five million, nine hundred ninety-five thousand, ninety".