265944940 has 24 divisors (see below), whose sum is σ = 591337152. Its totient is φ = 100120320.

The previous prime is 265944911. The next prime is 265944953. The reversal of 265944940 is 49449562.

It is a super-2 number, since 2×265944940² = 141453422223207200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 390756 + ... + 391435.

It is an arithmetic number, because the mean of its divisors is an integer number (24639048).

Almost surely, 2^265944940 is an apocalyptic number.

265944940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265944940 is an abundant number, since it is smaller than the sum of its proper divisors (325392212).

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

265944940 is a wasteful number, since it uses less digits than its factorization.

265944940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782217 (or 782215 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 265944940 is about 16307.8183703400. The cubic root of 265944940 is about 643.0783822174.

The spelling of 265944940 in words is "two hundred sixty-five million, nine hundred forty-four thousand, nine hundred forty".