33525440 has 56 divisors (see below), whose sum is σ = 85984080. Its totient is φ = 12377088.

The previous prime is 33525439. The next prime is 33525449. The reversal of 33525440 is 4452533.

It is a super-2 number, since 2×33525440² = 2247910254387200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (33525449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131 + ... + 8189.

It is an arithmetic number, because the mean of its divisors is an integer number (1535430).

Almost surely, 2^33525440 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 33525440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42992040).

33525440 is an abundant number, since it is smaller than the sum of its proper divisors (52458640).

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

33525440 is a wasteful number, since it uses less digits than its factorization.

33525440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8089 (or 8079 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 33525440 is about 5790.1157155967. The cubic root of 33525440 is about 322.4468674361.

Adding to 33525440 its reverse (4452533), we get a palindrome (37977973).

The spelling of 33525440 in words is "thirty-three million, five hundred twenty-five thousand, four hundred forty".