133243290 has 48 divisors (see below), whose sum is σ = 355804488. Its totient is φ = 34570368.

The previous prime is 133243289. The next prime is 133243307. The reversal of 133243290 is 92342331.

It is a happy number.

133243290 is a `hidden beast` number, since 1 + 332 + 4 + 329 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 123676641 + 9566649 = 11121^2 + 3093^2 .

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, 16677 + ... + 23336.

Almost surely, 2^133243290 is an apocalyptic number.

133243290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133243290 is an abundant number, since it is smaller than the sum of its proper divisors (222561198).

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

133243290 is a wasteful number, since it uses less digits than its factorization.

133243290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40063 (or 40060 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 133243290 is about 11543.1057345933. The cubic root of 133243290 is about 510.7579272720.

The spelling of 133243290 in words is "one hundred thirty-three million, two hundred forty-three thousand, two hundred ninety".