133405830 has 48 divisors (see below), whose sum is σ = 348107760. Its totient is φ = 35446464.

The previous prime is 133405813. The next prime is 133405837. The reversal of 133405830 is 38504331.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 133405794 and 133405803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133405837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23841 + ... + 28899.

It is an arithmetic number, because the mean of its divisors is an integer number (7252245).

Almost surely, 2^133405830 is an apocalyptic number.

133405830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133405830 is an abundant number, since it is smaller than the sum of its proper divisors (214701930).

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

133405830 is a wasteful number, since it uses less digits than its factorization.

133405830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5365 (or 5362 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 133405830 is about 11550.1441549446. The cubic root of 133405830 is about 510.9655296185.

The spelling of 133405830 in words is "one hundred thirty-three million, four hundred five thousand, eight hundred thirty".