33128706 has 16 divisors (see below), whose sum is σ = 71354304. Its totient is φ = 10193424.

The previous prime is 33128687. The next prime is 33128713. The reversal of 33128706 is 60782133.

It is a super-2 number, since 2×33128706² = 2195022322468872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212286 + ... + 212441.

It is an arithmetic number, because the mean of its divisors is an integer number (4459644).

Almost surely, 2^33128706 is an apocalyptic number.

33128706 is an abundant number, since it is smaller than the sum of its proper divisors (38225598).

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

33128706 is a wasteful number, since it uses less digits than its factorization.

33128706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424745.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 33128706 is about 5755.7541643124. The cubic root of 33128706 is about 321.1698909498.

The spelling of 33128706 in words is "thirty-three million, one hundred twenty-eight thousand, seven hundred six".