33618428 has 12 divisors (see below), whose sum is σ = 58873752. Its totient is φ = 16797360.

The previous prime is 33618421. The next prime is 33618439. The reversal of 33618428 is 82481633.

It is a happy number.

33618428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×33618428² = 2260397402382368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33618421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7598 + ... + 11178.

It is an arithmetic number, because the mean of its divisors is an integer number (4906146).

Almost surely, 2^33618428 is an apocalyptic number.

It is an amenable number.

33618428 is a deficient number, since it is larger than the sum of its proper divisors (25255324).

33618428 is a wasteful number, since it uses less digits than its factorization.

33618428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932 (or 5930 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 33618428 is about 5798.1400466012. The cubic root of 33618428 is about 322.7447110088.

The spelling of 33618428 in words is "thirty-three million, six hundred eighteen thousand, four hundred twenty-eight".