33280380 has 144 divisors (see below), whose sum is σ = 117534144. Its totient is φ = 7464960.

The previous prime is 33280367. The next prime is 33280417. The reversal of 33280380 is 8308233.

33280380 is a `hidden beast` number, since 3 + 3 + 280 + 380 = 666.

It is a super-2 number, since 2×33280380² = 2215167385888800, 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 47 ways as a sum of consecutive naturals, for example, 76644 + ... + 77076.

Almost surely, 2^33280380 is an apocalyptic number.

33280380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33280380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58767072).

33280380 is an abundant number, since it is smaller than the sum of its proper divisors (84253764).

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

33280380 is a wasteful number, since it uses less digits than its factorization.

33280380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 33280380 is about 5768.9149759725. The cubic root of 33280380 is about 321.6592849419.

The spelling of 33280380 in words is "thirty-three million, two hundred eighty thousand, three hundred eighty".