33430840 has 64 divisors (see below), whose sum is σ = 80364960. Its totient is φ = 12472320.

The previous prime is 33430829. The next prime is 33430841. The reversal of 33430840 is 4803433.

It is a super-2 number, since 2×33430840² = 2235242126211200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33430841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143364 + ... + 143596.

Almost surely, 2^33430840 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 33430840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40182480).

33430840 is an abundant number, since it is smaller than the sum of its proper divisors (46934120).

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

33430840 is a wasteful number, since it uses less digits than its factorization.

33430840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 33430840 is about 5781.9408506141. The cubic root of 33430840 is about 322.1432948889.

The spelling of 33430840 in words is "thirty-three million, four hundred thirty thousand, eight hundred forty".