33920920 has 32 divisors (see below), whose sum is σ = 83261520. Its totient is φ = 12334720.

The previous prime is 33920911. The next prime is 33920921. The reversal of 33920920 is 2902933.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33920921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38107 + ... + 38986.

Almost surely, 2^33920920 is an apocalyptic number.

It is an amenable number.

33920920 is an abundant number, since it is smaller than the sum of its proper divisors (49340600).

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

33920920 is a wasteful number, since it uses less digits than its factorization.

33920920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77115 (or 77111 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 33920920 is about 5824.1668932131. The cubic root of 33920920 is about 323.7098199515.

The spelling of 33920920 in words is "thirty-three million, nine hundred twenty thousand, nine hundred twenty".