266703840 has 240 divisors, whose sum is σ = 1014285888. Its totient is φ = 65608704.

The previous prime is 266703799. The next prime is 266703851. The reversal of 266703840 is 48307662.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×266703840² = 142261876541491200, which contains 22 as substring.

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 = 266703795 and 266703804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 167689 + ... + 169271.

Almost surely, 2^266703840 is an apocalyptic number.

266703840 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 266703840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (507142944).

266703840 is an abundant number, since it is smaller than the sum of its proper divisors (747582048).

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

266703840 is a wasteful number, since it uses less digits than its factorization.

266703840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623 (or 1606 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 266703840 is about 16331.0697751250. The cubic root of 266703840 is about 643.6894970630.

The spelling of 266703840 in words is "two hundred sixty-six million, seven hundred three thousand, eight hundred forty".