33158420 has 48 divisors (see below), whose sum is σ = 74390400. Its totient is φ = 12378240.

The previous prime is 33158407. The next prime is 33158423. The reversal of 33158420 is 2485133.

It is a self number, because there is not a number n which added to its sum of digits gives 33158420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33158423) 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, 26366 + ... + 27594.

It is an arithmetic number, because the mean of its divisors is an integer number (1549800).

Almost surely, 2^33158420 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 33158420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37195200).

33158420 is an abundant number, since it is smaller than the sum of its proper divisors (41231980).

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

33158420 is a wasteful number, since it uses less digits than its factorization.

33158420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 33158420 is about 5758.3348287504. The cubic root of 33158420 is about 321.2658841384.

The spelling of 33158420 in words is "thirty-three million, one hundred fifty-eight thousand, four hundred twenty".