266941440 has 176 divisors, whose sum is σ = 949152960. Its totient is φ = 71147520.

The previous prime is 266941391. The next prime is 266941457. The reversal of 266941440 is 44149662.

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 = 266941395 and 266941404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137275 + ... + 139205.

Almost surely, 2^266941440 is an apocalyptic number.

266941440 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 266941440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474576480).

266941440 is an abundant number, since it is smaller than the sum of its proper divisors (682211520).

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

266941440 is a wasteful number, since it uses less digits than its factorization.

266941440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965 (or 1941 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 266941440 is about 16338.3426332049. The cubic root of 266941440 is about 643.8805894622.

The spelling of 266941440 in words is "two hundred sixty-six million, nine hundred forty-one thousand, four hundred forty".