33689745828 has 60 divisors (see below), whose sum is σ = 88091066140. Its totient is φ = 11227439808.

The previous prime is 33689745821. The next prime is 33689745847. The reversal of 33689745828 is 82854798633.

33689745828 is a `hidden beast` number, since 33 + 68 + 97 + 458 + 2 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8690341284 + 24999404544 = 93222^2 + 158112^2 .

It is a super-2 number, since 2×33689745828² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33689745821) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2009850 + ... + 2026542.

Almost surely, 2^33689745828 is an apocalyptic number.

It is an amenable number.

33689745828 is an abundant number, since it is smaller than the sum of its proper divisors (54401320312).

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

33689745828 is a wasteful number, since it uses less digits than its factorization.

33689745828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22938 (or 22927 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 33689745828 in words is "thirty-three billion, six hundred eighty-nine million, seven hundred forty-five thousand, eight hundred twenty-eight".