266690928 has 120 divisors (see below), whose sum is σ = 807872400. Its totient is φ = 75586560.

The previous prime is 266690863. The next prime is 266690929. The reversal of 266690928 is 829096662.

266690928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×266690928² = 142248102155002368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266690929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 350068 + ... + 350828.

It is an arithmetic number, because the mean of its divisors is an integer number (6732270).

Almost surely, 2^266690928 is an apocalyptic number.

266690928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266690928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403936200).

266690928 is an abundant number, since it is smaller than the sum of its proper divisors (541181472).

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

266690928 is a wasteful number, since it uses less digits than its factorization.

266690928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 922 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 266690928 is about 16330.6744502485. The cubic root of 266690928 is about 643.6791091950.

The spelling of 266690928 in words is "two hundred sixty-six million, six hundred ninety thousand, nine hundred twenty-eight".