33355420 has 48 divisors (see below), whose sum is σ = 80982720. Its totient is φ = 11303424.

The previous prime is 33355403. The next prime is 33355433. The reversal of 33355420 is 2455333.

It is a happy number.

It is a super-2 number, since 2×33355420² = 2225168086752800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11122 + ... + 13798.

It is an arithmetic number, because the mean of its divisors is an integer number (1687140).

Almost surely, 2^33355420 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 33355420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40491360).

33355420 is an abundant number, since it is smaller than the sum of its proper divisors (47627300).

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

33355420 is a wasteful number, since it uses less digits than its factorization.

33355420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782 (or 2780 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 33355420 is about 5775.4151365941. The cubic root of 33355420 is about 321.9008606488.

The spelling of 33355420 in words is "thirty-three million, three hundred fifty-five thousand, four hundred twenty".