33872109 has 32 divisors (see below), whose sum is σ = 49787136. Its totient is φ = 20398080.

The previous prime is 33872107. The next prime is 33872147. The reversal of 33872109 is 90127833.

It is not a de Polignac number, because 33872109 - 2¹ = 33872107 is a prime.

It is a super-2 number, since 2×33872109² = 2294639536215762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33872109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33872107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202744 + ... + 202910.

It is an arithmetic number, because the mean of its divisors is an integer number (1555848).

Almost surely, 2^33872109 is an apocalyptic number.

It is an amenable number.

33872109 is a deficient number, since it is larger than the sum of its proper divisors (15915027).

33872109 is a wasteful number, since it uses less digits than its factorization.

33872109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 33872109 is about 5819.9749999463. The cubic root of 33872109 is about 323.5544764357.

The spelling of 33872109 in words is "thirty-three million, eight hundred seventy-two thousand, one hundred nine".