33628513 has 4 divisors (see below), whose sum is σ = 33802948. Its totient is φ = 33454080.

The previous prime is 33628501. The next prime is 33628541. The reversal of 33628513 is 31582633.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16916769 + 16711744 = 4113^2 + 4088^2 .

It is a cyclic number.

It is not a de Polignac number, because 33628513 - 2⁵ = 33628481 is a prime.

It is a super-2 number, since 2×33628513² = 2261753773182338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33628013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86928 + ... + 87313.

It is an arithmetic number, because the mean of its divisors is an integer number (8450737).

Almost surely, 2^33628513 is an apocalyptic number.

It is an amenable number.

33628513 is a deficient number, since it is larger than the sum of its proper divisors (174435).

33628513 is a wasteful number, since it uses less digits than its factorization.

33628513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174434.

The product of its digits is 12960, while the sum is 31.

The square root of 33628513 is about 5799.0096568293. The cubic root of 33628513 is about 322.7769805624.

The spelling of 33628513 in words is "thirty-three million, six hundred twenty-eight thousand, five hundred thirteen".