133445778 has 32 divisors (see below), whose sum is σ = 284912640. Its totient is φ = 41544720.

The previous prime is 133445749. The next prime is 133445783. The reversal of 133445778 is 877544331.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150 + ... + 16337.

It is an arithmetic number, because the mean of its divisors is an integer number (8903520).

Almost surely, 2^133445778 is an apocalyptic number.

133445778 is an abundant number, since it is smaller than the sum of its proper divisors (151466862).

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

133445778 is a wasteful number, since it uses less digits than its factorization.

133445778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16582.

The product of its digits is 282240, while the sum is 42.

The square root of 133445778 is about 11551.8733545689. The cubic root of 133445778 is about 511.0165269246.

The spelling of 133445778 in words is "one hundred thirty-three million, four hundred forty-five thousand, seven hundred seventy-eight".