266012890 has 32 divisors (see below), whose sum is σ = 562536576. Its totient is φ = 89290560.

The previous prime is 266012867. The next prime is 266012893. The reversal of 266012890 is 98210662.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (266012893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91582 + ... + 94441.

It is an arithmetic number, because the mean of its divisors is an integer number (17579268).

Almost surely, 2^266012890 is an apocalyptic number.

266012890 is an abundant number, since it is smaller than the sum of its proper divisors (296523686).

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

266012890 is a wasteful number, since it uses less digits than its factorization.

266012890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186054.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 266012890 is about 16309.9015938172. The cubic root of 266012890 is about 643.1331472563.

The spelling of 266012890 in words is "two hundred sixty-six million, twelve thousand, eight hundred ninety".