33291940 has 36 divisors (see below), whose sum is σ = 76852188. Its totient is φ = 12105280.

The previous prime is 33291931. The next prime is 33291941. The reversal of 33291940 is 4919233.

It can be written as a sum of positive squares in 2 ways, for example, as 5645376 + 27646564 = 2376^2 + 5258^2 .

It is a super-2 number, since 2×33291940² = 2216706537927200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33291941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4459 + ... + 9298.

It is an arithmetic number, because the mean of its divisors is an integer number (2134783).

Almost surely, 2^33291940 is an apocalyptic number.

It is an amenable number.

33291940 is an abundant number, since it is smaller than the sum of its proper divisors (43560248).

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

33291940 is a wasteful number, since it uses less digits than its factorization.

33291940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13788 (or 13775 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 33291940 is about 5769.9168104922. The cubic root of 33291940 is about 321.6965236081.

The spelling of 33291940 in words is "thirty-three million, two hundred ninety-one thousand, nine hundred forty".