33898240 has 72 divisors (see below), whose sum is σ = 82561248. Its totient is φ = 13332480.

The previous prime is 33898211. The next prime is 33898247. The reversal of 33898240 is 4289833.

It is a super-2 number, since 2×33898240² = 2298181350195200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33898240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33898247) 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, 90694 + ... + 91066.

It is an arithmetic number, because the mean of its divisors is an integer number (1146684).

Almost surely, 2^33898240 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 33898240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41280624).

33898240 is an abundant number, since it is smaller than the sum of its proper divisors (48663008).

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

33898240 is an equidigital number, since it uses as much as digits as its factorization.

33898240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 33898240 is about 5822.2195080570. The cubic root of 33898240 is about 323.6376582336.

The spelling of 33898240 in words is "thirty-three million, eight hundred ninety-eight thousand, two hundred forty".