133918812 has 24 divisors (see below), whose sum is σ = 347197200. Its totient is φ = 44639568.

The previous prime is 133918801. The next prime is 133918861. The reversal of 133918812 is 218819331.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619887 + ... + 620102.

It is an arithmetic number, because the mean of its divisors is an integer number (14466550).

Almost surely, 2^133918812 is an apocalyptic number.

133918812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133918812 is an abundant number, since it is smaller than the sum of its proper divisors (213278388).

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

133918812 is a wasteful number, since it uses less digits than its factorization.

133918812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240002 (or 1239994 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 133918812 is about 11572.3295839688. The cubic root of 133918812 is about 511.6196261342.

The spelling of 133918812 in words is "one hundred thirty-three million, nine hundred eighteen thousand, eight hundred twelve".