33081090 has 64 divisors (see below), whose sum is σ = 95523840. Its totient is φ = 7162560.

The previous prime is 33081077. The next prime is 33081119. The reversal of 33081090 is 9018033.

It is a self number, because there is not a number n which added to its sum of digits gives 33081090.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156 + ... + 8135.

It is an arithmetic number, because the mean of its divisors is an integer number (1492560).

Almost surely, 2^33081090 is an apocalyptic number.

33081090 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 33081090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47761920).

33081090 is an abundant number, since it is smaller than the sum of its proper divisors (62442750).

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

33081090 is a wasteful number, since it uses less digits than its factorization.

33081090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8327.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 33081090 is about 5751.6162945732. The cubic root of 33081090 is about 321.0159443172.

The spelling of 33081090 in words is "thirty-three million, eighty-one thousand, ninety".