265887990 has 48 divisors (see below), whose sum is σ = 731978208. Its totient is φ = 66732288.

The previous prime is 265887989. The next prime is 265888013. The reversal of 265887990 is 99788562.

It is a happy number.

265887990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85362 + ... + 88421.

It is an arithmetic number, because the mean of its divisors is an integer number (15249546).

Almost surely, 2^265887990 is an apocalyptic number.

265887990 is an abundant number, since it is smaller than the sum of its proper divisors (466090218).

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

265887990 is a wasteful number, since it uses less digits than its factorization.

265887990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173813 (or 173810 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 265887990 is about 16306.0721818591. The cubic root of 265887990 is about 643.0324755617.

The spelling of 265887990 in words is "two hundred sixty-five million, eight hundred eighty-seven thousand, nine hundred ninety".