265943490 has 32 divisors (see below), whose sum is σ = 639817920. Its totient is φ = 70745664.

The previous prime is 265943477. The next prime is 265943497. The reversal of 265943490 is 94349562.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (265943497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1992 + ... + 23148.

It is an arithmetic number, because the mean of its divisors is an integer number (19994310).

Almost surely, 2^265943490 is an apocalyptic number.

265943490 is an abundant number, since it is smaller than the sum of its proper divisors (373874430).

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

265943490 is a wasteful number, since it uses less digits than its factorization.

265943490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21586.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 265943490 is about 16307.7739130759. The cubic root of 265943490 is about 643.0772134725.

The spelling of 265943490 in words is "two hundred sixty-five million, nine hundred forty-three thousand, four hundred ninety".