133645330 has 128 divisors (see below), whose sum is σ = 321366528. Its totient is φ = 38817792.

The previous prime is 133645319. The next prime is 133645331. The reversal of 133645330 is 33546331.

133645330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×133645330² = 35722148461617800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133645331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 819829 + ... + 819991.

It is an arithmetic number, because the mean of its divisors is an integer number (2510676).

Almost surely, 2^133645330 is an apocalyptic number.

133645330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133645330 is an abundant number, since it is smaller than the sum of its proper divisors (187721198).

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

133645330 is a wasteful number, since it uses less digits than its factorization.

133645330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its (nonzero) digits is 9720, while the sum is 28.

The square root of 133645330 is about 11560.5073418081. The cubic root of 133645330 is about 511.2711211716.

The spelling of 133645330 in words is "one hundred thirty-three million, six hundred forty-five thousand, three hundred thirty".