133280290 has 96 divisors (see below), whose sum is σ = 292929840. Its totient is φ = 43338240.

The previous prime is 133280281. The next prime is 133280291. The reversal of 133280290 is 92082331.

It can be written as a sum of positive squares in 8 ways, for example, as 95199049 + 38081241 = 9757^2 + 6171^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133280291) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 581896 + ... + 582124.

Almost surely, 2^133280290 is an apocalyptic number.

133280290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133280290 is an abundant number, since it is smaller than the sum of its proper divisors (159649550).

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

133280290 is a wasteful number, since it uses less digits than its factorization.

133280290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 133280290 is about 11544.7083116032. The cubic root of 133280290 is about 510.8051999323.

The spelling of 133280290 in words is "one hundred thirty-three million, two hundred eighty thousand, two hundred ninety".