266290340 has 12 divisors (see below), whose sum is σ = 559209756. Its totient is φ = 106516128.

The previous prime is 266290337. The next prime is 266290411. The reversal of 266290340 is 43092662.

It can be written as a sum of positive squares in 2 ways, for example, as 35736484 + 230553856 = 5978^2 + 15184^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 266290297 and 266290306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6657239 + ... + 6657278.

It is an arithmetic number, because the mean of its divisors is an integer number (46600813).

Almost surely, 2^266290340 is an apocalyptic number.

266290340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266290340 is an abundant number, since it is smaller than the sum of its proper divisors (292919416).

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

266290340 is a wasteful number, since it uses less digits than its factorization.

266290340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13314526 (or 13314524 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 266290340 is about 16318.4049465626. The cubic root of 266290340 is about 643.3566643589.

The spelling of 266290340 in words is "two hundred sixty-six million, two hundred ninety thousand, three hundred forty".