266231040 has 288 divisors, whose sum is σ = 927158400. Its totient is φ = 64880640.

The previous prime is 266231029. The next prime is 266231093. The reversal of 266231040 is 40132662.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 266231040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2991316 + ... + 2991404.

It is an arithmetic number, because the mean of its divisors is an integer number (3219300).

Almost surely, 2^266231040 is an apocalyptic number.

266231040 is a gapful number since it is divisible by the number (20) 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 266231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463579200).

266231040 is an abundant number, since it is smaller than the sum of its proper divisors (660927360).

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

266231040 is a wasteful number, since it uses less digits than its factorization.

266231040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 266231040 is about 16316.5878785977. The cubic root of 266231040 is about 643.3089046060.

The spelling of 266231040 in words is "two hundred sixty-six million, two hundred thirty-one thousand, forty".