33156090 has 96 divisors (see below), whose sum is σ = 95224896. Its totient is φ = 7937280.

The previous prime is 33156073. The next prime is 33156091. The reversal of 33156090 is 9065133.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (33156091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 105774 + ... + 106086.

It is an arithmetic number, because the mean of its divisors is an integer number (991926).

Almost surely, 2^33156090 is an apocalyptic number.

33156090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 33156090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47612448).

33156090 is an abundant number, since it is smaller than the sum of its proper divisors (62068806).

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

33156090 is a wasteful number, since it uses less digits than its factorization.

33156090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 33156090 is about 5758.1325097639. The cubic root of 33156090 is about 321.2583589805.

The spelling of 33156090 in words is "thirty-three million, one hundred fifty-six thousand, ninety".