33139722 has 48 divisors (see below), whose sum is σ = 83272896. Its totient is φ = 8606400.

The previous prime is 33139709. The next prime is 33139723. The reversal of 33139722 is 22793133.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 33139722.

It is not an unprimeable number, because it can be changed into a prime (33139723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1822 + ... + 8342.

It is an arithmetic number, because the mean of its divisors is an integer number (1734852).

Almost surely, 2^33139722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33139722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41636448).

33139722 is an abundant number, since it is smaller than the sum of its proper divisors (50133174).

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

33139722 is a wasteful number, since it uses less digits than its factorization.

33139722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6555 (or 6544 counting only the distinct ones).

The product of its digits is 6804, while the sum is 30.

The square root of 33139722 is about 5756.7110401687. The cubic root of 33139722 is about 321.2054856135.

The spelling of 33139722 in words is "thirty-three million, one hundred thirty-nine thousand, seven hundred twenty-two".