33638973 has 8 divisors (see below), whose sum is σ = 45175200. Its totient is φ = 22264368.

The previous prime is 33638947. The next prime is 33638993. The reversal of 33638973 is 37983633.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 33638973 - 2¹³ = 33630781 is a prime.

It is a super-2 number, since 2×33638973² = 2263161008989458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33638923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39918 + ... + 40751.

It is an arithmetic number, because the mean of its divisors is an integer number (5646900).

Almost surely, 2^33638973 is an apocalyptic number.

It is an amenable number.

33638973 is a deficient number, since it is larger than the sum of its proper divisors (11536227).

33638973 is a wasteful number, since it uses less digits than its factorization.

33638973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80811.

The product of its digits is 244944, while the sum is 42.

The square root of 33638973 is about 5799.9114648415. The cubic root of 33638973 is about 322.8104432098.

The spelling of 33638973 in words is "thirty-three million, six hundred thirty-eight thousand, nine hundred seventy-three".