133828815 has 64 divisors (see below), whose sum is σ = 230699520. Its totient is φ = 66147840.

The previous prime is 133828801. The next prime is 133828817. The reversal of 133828815 is 518828331.

It is not a de Polignac number, because 133828815 - 2⁷ = 133828687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133828817) 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, 1997412 + ... + 1997478.

It is an arithmetic number, because the mean of its divisors is an integer number (3604680).

Almost surely, 2^133828815 is an apocalyptic number.

133828815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133828815 is a deficient number, since it is larger than the sum of its proper divisors (96870705).

133828815 is a wasteful number, since it uses less digits than its factorization.

133828815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232.

The product of its digits is 46080, while the sum is 39.

The square root of 133828815 is about 11568.4404739792. The cubic root of 133828815 is about 511.5049931239.

The spelling of 133828815 in words is "one hundred thirty-three million, eight hundred twenty-eight thousand, eight hundred fifteen".