266143444 has 12 divisors (see below), whose sum is σ = 532286944. Its totient is φ = 114061464.

The previous prime is 266143441. The next prime is 266143453. The reversal of 266143444 is 444341662.

266143444 is an admirable number.

It is a super-2 number, since 2×266143444² = 141664665568362272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266143441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4752534 + ... + 4752589.

Almost surely, 2^266143444 is an apocalyptic number.

It is an amenable number.

266143444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

266143444 is a wasteful number, since it uses less digits than its factorization.

266143444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9505134 (or 9505132 counting only the distinct ones).

The product of its digits is 55296, while the sum is 34.

The square root of 266143444 is about 16313.9033955703. The cubic root of 266143444 is about 643.2383425005.

The spelling of 266143444 in words is "two hundred sixty-six million, one hundred forty-three thousand, four hundred forty-four".