266821434 has 48 divisors (see below), whose sum is σ = 631762560. Its totient is φ = 80714880.

The previous prime is 266821421. The next prime is 266821483. The reversal of 266821434 is 434128662.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205074 + ... + 206370.

It is an arithmetic number, because the mean of its divisors is an integer number (13161720).

Almost surely, 2^266821434 is an apocalyptic number.

266821434 is an abundant number, since it is smaller than the sum of its proper divisors (364941126).

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

266821434 is a wasteful number, since it uses less digits than its factorization.

266821434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355 (or 2352 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 266821434 is about 16334.6696936302. The cubic root of 266821434 is about 643.7840875028.

The spelling of 266821434 in words is "two hundred sixty-six million, eight hundred twenty-one thousand, four hundred thirty-four".