265399990 has 32 divisors (see below), whose sum is σ = 514584576. Its totient is φ = 98266080.

The previous prime is 265399987. The next prime is 265400063. The reversal of 265399990 is 99993562.

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, 11482 + ... + 25741.

It is an arithmetic number, because the mean of its divisors is an integer number (16080768).

Almost surely, 2^265399990 is an apocalyptic number.

265399990 is a deficient number, since it is larger than the sum of its proper divisors (249184586).

265399990 is a wasteful number, since it uses less digits than its factorization.

265399990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37284.

The product of its (nonzero) digits is 1180980, while the sum is 52.

The square root of 265399990 is about 16291.1015588265. The cubic root of 265399990 is about 642.6388360915.

The spelling of 265399990 in words is "two hundred sixty-five million, three hundred ninety-nine thousand, nine hundred ninety".