33909798 has 64 divisors (see below), whose sum is σ = 78382080. Its totient is φ = 9687552.

The previous prime is 33909793. The next prime is 33909817. The reversal of 33909798 is 89790933.

It is a super-2 number, since 2×33909798² = 2299748800801608, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33909793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141763 + ... + 142001.

It is an arithmetic number, because the mean of its divisors is an integer number (1224720).

Almost surely, 2^33909798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33909798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39191040).

33909798 is an abundant number, since it is smaller than the sum of its proper divisors (44472282).

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

33909798 is a wasteful number, since it uses less digits than its factorization.

33909798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381.

The product of its (nonzero) digits is 367416, while the sum is 48.

The square root of 33909798 is about 5823.2120002624. The cubic root of 33909798 is about 323.6744367310.

The spelling of 33909798 in words is "thirty-three million, nine hundred nine thousand, seven hundred ninety-eight".