33231380 has 144 divisors (see below), whose sum is σ = 93421440. Its totient is φ = 9642240.

The previous prime is 33231377. The next prime is 33231391. The reversal of 33231380 is 8313233.

It is a super-2 number, since 2×33231380² = 2208649233408800, 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 47 ways as a sum of consecutive naturals, for example, 1071965 + ... + 1071995.

It is an arithmetic number, because the mean of its divisors is an integer number (648760).

Almost surely, 2^33231380 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 33231380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46710720).

33231380 is an abundant number, since it is smaller than the sum of its proper divisors (60190060).

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

33231380 is a wasteful number, since it uses less digits than its factorization.

33231380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 33231380 is about 5764.6665124706. Note that the first 3 decimals coincide. The cubic root of 33231380 is about 321.5013435700.

The spelling of 33231380 in words is "thirty-three million, two hundred thirty-one thousand, three hundred eighty".