33820380 has 288 divisors, whose sum is σ = 125798400. Its totient is φ = 7257600.

The previous prime is 33820379. The next prime is 33820421. The reversal of 33820380 is 8302833.

It is a super-2 number, since 2×33820380² = 2287636206688800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1090965 + ... + 1090995.

It is an arithmetic number, because the mean of its divisors is an integer number (436800).

Almost surely, 2^33820380 is an apocalyptic number.

33820380 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 33820380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62899200).

33820380 is an abundant number, since it is smaller than the sum of its proper divisors (91978020).

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

33820380 is a wasteful number, since it uses less digits than its factorization.

33820380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 100 counting only the distinct ones).

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

The square root of 33820380 is about 5815.5292106566. The cubic root of 33820380 is about 323.3896832623.

The spelling of 33820380 in words is "thirty-three million, eight hundred twenty thousand, three hundred eighty".