33854665428 has 36 divisors (see below), whose sum is σ = 85822309300. Its totient is φ = 11252549376.

The previous prime is 33854665421. The next prime is 33854665441. The reversal of 33854665428 is 82456645833.

33854665428 is a `hidden beast` number, since 3 + 38 + 5 + 4 + 66 + 542 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10449337284 + 23405328144 = 102222^2 + 152988^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×33854665428² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33854665421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1334725 + ... + 1359852.

Almost surely, 2^33854665428 is an apocalyptic number.

It is an amenable number.

33854665428 is an abundant number, since it is smaller than the sum of its proper divisors (51967643872).

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

33854665428 is a wasteful number, since it uses less digits than its factorization.

33854665428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694936 (or 2694931 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 54.

The spelling of 33854665428 in words is "thirty-three billion, eight hundred fifty-four million, six hundred sixty-five thousand, four hundred twenty-eight".