33928013 has 16 divisors (see below), whose sum is σ = 40642560. Its totient is φ = 27692016.

The previous prime is 33927997. The next prime is 33928019. The reversal of 33928013 is 31082933.

It is a cyclic number.

It is not a de Polignac number, because 33928013 - 2⁴ = 33927997 is a prime.

It is a super-2 number, since 2×33928013² = 2302220132256338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33928019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57506 + ... + 58092.

It is an arithmetic number, because the mean of its divisors is an integer number (2540160).

Almost surely, 2^33928013 is an apocalyptic number.

It is an amenable number.

33928013 is a deficient number, since it is larger than the sum of its proper divisors (6714547).

33928013 is a wasteful number, since it uses less digits than its factorization.

33928013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 33928013 is about 5824.7757896764. The cubic root of 33928013 is about 323.7323813849.

The spelling of 33928013 in words is "thirty-three million, nine hundred twenty-eight thousand, thirteen".