33725728 has 24 divisors (see below), whose sum is σ = 69285888. Its totient is φ = 16129344.

The previous prime is 33725719. The next prime is 33725761. The reversal of 33725728 is 82752733.

It is a super-2 number, since 2×33725728² = 2274849458259968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

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, 22176 + ... + 23647.

It is an arithmetic number, because the mean of its divisors is an integer number (2886912).

Almost surely, 2^33725728 is an apocalyptic number.

It is an amenable number.

33725728 is an abundant number, since it is smaller than the sum of its proper divisors (35560160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33725728 is a wasteful number, since it uses less digits than its factorization.

33725728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45856 (or 45848 counting only the distinct ones).

The product of its digits is 70560, while the sum is 37.

The square root of 33725728 is about 5807.3856424384. The cubic root of 33725728 is about 323.0877146462.

It can be divided in two parts, 33725 and 728, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 33725728 in words is "thirty-three million, seven hundred twenty-five thousand, seven hundred twenty-eight".