33228638 has 4 divisors (see below), whose sum is σ = 49842960. Its totient is φ = 16614318.

The previous prime is 33228631. The next prime is 33228641. The reversal of 33228638 is 83682233.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83682233 = 71 ⋅1178623.

It is a super-2 number, since 2×33228638² = 2208284766670088, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33228598 and 33228607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33228631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8307158 + ... + 8307161.

It is an arithmetic number, because the mean of its divisors is an integer number (12460740).

Almost surely, 2^33228638 is an apocalyptic number.

33228638 is a deficient number, since it is larger than the sum of its proper divisors (16614322).

33228638 is a wasteful number, since it uses less digits than its factorization.

33228638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16614321.

The product of its digits is 41472, while the sum is 35.

The square root of 33228638 is about 5764.4286794096. The cubic root of 33228638 is about 321.4925007139.

The spelling of 33228638 in words is "thirty-three million, two hundred twenty-eight thousand, six hundred thirty-eight".