33312728 has 16 divisors (see below), whose sum is σ = 64150080. Its totient is φ = 16206048.

The previous prime is 33312683. The next prime is 33312737. The reversal of 33312728 is 82721333.

It is a super-2 number, since 2×33312728² = 2219475693603968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33312728.

It is a congruent number.

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, 55976 + ... + 56567.

It is an arithmetic number, because the mean of its divisors is an integer number (4009380).

Almost surely, 2^33312728 is an apocalyptic number.

It is an amenable number.

33312728 is a deficient number, since it is larger than the sum of its proper divisors (30837352).

33312728 is a wasteful number, since it uses less digits than its factorization.

33312728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112586 (or 112582 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 33312728 is about 5771.7179418263. The cubic root of 33312728 is about 321.7634670976.

The spelling of 33312728 in words is "thirty-three million, three hundred twelve thousand, seven hundred twenty-eight".