33053240 has 64 divisors (see below), whose sum is σ = 83064960. Its totient is φ = 11733120.

The previous prime is 33053233. The next prime is 33053249. The reversal of 33053240 is 4235033.

It is a super-3 number, since 3×33053240³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33053249) 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 15 ways as a sum of consecutive naturals, for example, 18047 + ... + 19793.

It is an arithmetic number, because the mean of its divisors is an integer number (1297890).

Almost surely, 2^33053240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33053240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41532480).

33053240 is an abundant number, since it is smaller than the sum of its proper divisors (50011720).

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

33053240 is a wasteful number, since it uses less digits than its factorization.

33053240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812 (or 1808 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 33053240 is about 5749.1947262204. The cubic root of 33053240 is about 320.9258343876.

Adding to 33053240 its reverse (4235033), we get a palindrome (37288273).

The spelling of 33053240 in words is "thirty-three million, fifty-three thousand, two hundred forty".