33728873 has 4 divisors (see below), whose sum is σ = 33903828. Its totient is φ = 33553920.

The previous prime is 33728869. The next prime is 33728897. The reversal of 33728873 is 37882733.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3829849 + 29899024 = 1957^2 + 5468^2 .

It is a cyclic number.

It is not a de Polignac number, because 33728873 - 2² = 33728869 is a prime.

It is a super-2 number, since 2×33728873² = 2275273747700258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33728873.

It is not an unprimeable number, because it can be changed into a prime (33728803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87188 + ... + 87573.

It is an arithmetic number, because the mean of its divisors is an integer number (8475957).

Almost surely, 2^33728873 is an apocalyptic number.

It is an amenable number.

33728873 is a deficient number, since it is larger than the sum of its proper divisors (174955).

33728873 is a wasteful number, since it uses less digits than its factorization.

33728873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174954.

The product of its digits is 169344, while the sum is 41.

The square root of 33728873 is about 5807.6564120134. The cubic root of 33728873 is about 323.0977572194.

The spelling of 33728873 in words is "thirty-three million, seven hundred twenty-eight thousand, eight hundred seventy-three".