33261728 has 12 divisors (see below), whose sum is σ = 65484090. Its totient is φ = 16630848.

The previous prime is 33261721. The next prime is 33261731. The reversal of 33261728 is 82716233.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25928464 + 7333264 = 5092^2 + 2708^2 .

It is a super-2 number, since 2×33261728² = 2212685099091968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 1039429 = 33261728 / (3 + 3 + 2 + 6 + 1 + 7 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 33261694 and 33261703.

It is not an unprimeable number, because it can be changed into a prime (33261721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519683 + ... + 519746.

Almost surely, 2^33261728 is an apocalyptic number.

It is an amenable number.

33261728 is a deficient number, since it is larger than the sum of its proper divisors (32222362).

33261728 is a wasteful number, since it uses less digits than its factorization.

33261728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039439 (or 1039431 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 33261728 is about 5767.2981542487. The cubic root of 33261728 is about 321.5991823614.

The spelling of 33261728 in words is "thirty-three million, two hundred sixty-one thousand, seven hundred twenty-eight".