266890992 has 20 divisors (see below), whose sum is σ = 689468520. Its totient is φ = 88963648.

The previous prime is 266890991. The next prime is 266890999. The reversal of 266890992 is 299098662.

It is a super-2 number, since 2×266890992² = 142461603221488128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266890991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780067 + ... + 2780162.

It is an arithmetic number, because the mean of its divisors is an integer number (34473426).

Almost surely, 2^266890992 is an apocalyptic number.

It is an amenable number.

266890992 is an abundant number, since it is smaller than the sum of its proper divisors (422577528).

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

266890992 is a wasteful number, since it uses less digits than its factorization.

266890992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560240 (or 5560234 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 266890992 is about 16336.7987072131. The cubic root of 266890992 is about 643.8400255912.

The spelling of 266890992 in words is "two hundred sixty-six million, eight hundred ninety thousand, nine hundred ninety-two".