266752440 has 320 divisors, whose sum is σ = 987940800. Its totient is φ = 64253952.

The previous prime is 266752429. The next prime is 266752463. The reversal of 266752440 is 44257662.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 266752395 and 266752404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1597237 + ... + 1597403.

It is an arithmetic number, because the mean of its divisors is an integer number (3087315).

Almost surely, 2^266752440 is an apocalyptic number.

266752440 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 266752440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493970400).

266752440 is an abundant number, since it is smaller than the sum of its proper divisors (721188360).

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

266752440 is a wasteful number, since it uses less digits than its factorization.

266752440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 266752440 is about 16332.5576686568. The cubic root of 266752440 is about 643.7285933750.

The spelling of 266752440 in words is "two hundred sixty-six million, seven hundred fifty-two thousand, four hundred forty".