33228240 has 40 divisors (see below), whose sum is σ = 103008288. Its totient is φ = 8860800.

The previous prime is 33228233. The next prime is 33228253. The reversal of 33228240 is 4282233.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×33228240² = 2208231866995200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 33228240.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68986 + ... + 69465.

Almost surely, 2^33228240 is an apocalyptic number.

33228240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33228240 is an abundant number, since it is smaller than the sum of its proper divisors (69780048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33228240 is a wasteful number, since it uses less digits than its factorization.

33228240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138467 (or 138461 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 33228240 is about 5764.3941572380. The cubic root of 33228240 is about 321.4912171371.

The spelling of 33228240 in words is "thirty-three million, two hundred twenty-eight thousand, two hundred forty".