33025840 has 40 divisors (see below), whose sum is σ = 78097680. Its totient is φ = 12984576.

The previous prime is 33025831. The next prime is 33025843. The reversal of 33025840 is 4852033.

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

It is a super-2 number, since 2×33025840² = 2181412215411200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33025843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1222 + ... + 8218.

It is an arithmetic number, because the mean of its divisors is an integer number (1952442).

Almost surely, 2^33025840 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 33025840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39048840).

33025840 is an abundant number, since it is smaller than the sum of its proper divisors (45071840).

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

33025840 is a wasteful number, since it uses less digits than its factorization.

33025840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7069 (or 7063 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 33025840 is about 5746.8112897502. The cubic root of 33025840 is about 320.8371310433.

Adding to 33025840 its reverse (4852033), we get a palindrome (37877873).

The spelling of 33025840 in words is "thirty-three million, twenty-five thousand, eight hundred forty".