33520890 has 128 divisors (see below), whose sum is σ = 93768192. Its totient is φ = 7603200.

The previous prime is 33520859. The next prime is 33520891. The reversal of 33520890 is 9802533.

It is a happy number.

It is a super-2 number, since 2×33520890² = 2247300132784200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (33520891) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 331840 + ... + 331940.

It is an arithmetic number, because the mean of its divisors is an integer number (732564).

Almost surely, 2^33520890 is an apocalyptic number.

33520890 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 33520890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46884096).

33520890 is an abundant number, since it is smaller than the sum of its proper divisors (60247302).

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

33520890 is a wasteful number, since it uses less digits than its factorization.

33520890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 33520890 is about 5789.7227912915. The cubic root of 33520890 is about 322.4322795130.

The spelling of 33520890 in words is "thirty-three million, five hundred twenty thousand, eight hundred ninety".