33728243 has 8 divisors (see below), whose sum is σ = 34186320. Its totient is φ = 33272800.

The previous prime is 33728237. The next prime is 33728251. The reversal of 33728243 is 34282733.

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

It is a cyclic number.

It is not a de Polignac number, because 33728243 - 2¹⁰ = 33727219 is a prime.

It is a super-2 number, since 2×33728243² = 2275188751734098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33728203) 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, 41921 + ... + 42717.

It is an arithmetic number, because the mean of its divisors is an integer number (4273290).

Almost surely, 2^33728243 is an apocalyptic number.

33728243 is a deficient number, since it is larger than the sum of its proper divisors (458077).

33728243 is a wasteful number, since it uses less digits than its factorization.

33728243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317.

The product of its digits is 24192, while the sum is 32.

The square root of 33728243 is about 5807.6021730143. The cubic root of 33728243 is about 323.0957455616.

The spelling of 33728243 in words is "thirty-three million, seven hundred twenty-eight thousand, two hundred forty-three".