133423830 has 24 divisors (see below), whose sum is σ = 346902192. Its totient is φ = 35579664.

The previous prime is 133423793. The next prime is 133423841. The reversal of 133423830 is 38324331.

It is a junction number, because it is equal to n+sod(n) for n = 133423794 and 133423803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 741154 + ... + 741333.

It is an arithmetic number, because the mean of its divisors is an integer number (14454258).

Almost surely, 2^133423830 is an apocalyptic number.

133423830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133423830 is an abundant number, since it is smaller than the sum of its proper divisors (213478362).

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

133423830 is a wasteful number, since it uses less digits than its factorization.

133423830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482500 (or 1482497 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 133423830 is about 11550.9233397162. The cubic root of 133423830 is about 510.9885095385.

The spelling of 133423830 in words is "one hundred thirty-three million, four hundred twenty-three thousand, eight hundred thirty".