33428566 has 8 divisors (see below), whose sum is σ = 50168664. Its totient is φ = 16705680.

The previous prime is 33428513. The next prime is 33428569. The reversal of 33428566 is 66582433.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×33428566² = 2234938049632712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33428569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3106 + ... + 8746.

It is an arithmetic number, because the mean of its divisors is an integer number (6271083).

Almost surely, 2^33428566 is an apocalyptic number.

33428566 is a deficient number, since it is larger than the sum of its proper divisors (16740098).

33428566 is a wasteful number, since it uses less digits than its factorization.

33428566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8606.

The product of its digits is 103680, while the sum is 37.

The square root of 33428566 is about 5781.7442004987. The cubic root of 33428566 is about 322.1359905509.

It can be divided in two parts, 334 and 28566, that added together give a square (28900 = 170²).

The spelling of 33428566 in words is "thirty-three million, four hundred twenty-eight thousand, five hundred sixty-six".