33120540 has 36 divisors (see below), whose sum is σ = 100466184. Its totient is φ = 8832096.

The previous prime is 33120517. The next prime is 33120541. The reversal of 33120540 is 4502133.

33120540 is a `hidden beast` number, since 3 + 3 + 120 + 540 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33120541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91822 + ... + 92181.

Almost surely, 2^33120540 is an apocalyptic number.

33120540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33120540 is an abundant number, since it is smaller than the sum of its proper divisors (67345644).

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

33120540 is a wasteful number, since it uses less digits than its factorization.

33120540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184018 (or 184013 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 33120540 is about 5755.0447435272. The cubic root of 33120540 is about 321.1435000524.

Adding to 33120540 its reverse (4502133), we get a palindrome (37622673).

The spelling of 33120540 in words is "thirty-three million, one hundred twenty thousand, five hundred forty".