33728516 has 12 divisors (see below), whose sum is σ = 60281088. Its totient is φ = 16505352.

The previous prime is 33728507. The next prime is 33728531. The reversal of 33728516 is 61582733.

It is a super-2 number, since 2×33728516² = 2275225583124512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89516 + ... + 89891.

It is an arithmetic number, because the mean of its divisors is an integer number (5023424).

Almost surely, 2^33728516 is an apocalyptic number.

It is an amenable number.

33728516 is a deficient number, since it is larger than the sum of its proper divisors (26552572).

33728516 is a wasteful number, since it uses less digits than its factorization.

33728516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179458 (or 179456 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 33728516 is about 5807.6256766427. The cubic root of 33728516 is about 323.0966172831.

The spelling of 33728516 in words is "thirty-three million, seven hundred twenty-eight thousand, five hundred sixteen".