33639980 has 24 divisors (see below), whose sum is σ = 77066640. Its totient is φ = 12232640.

The previous prime is 33639959. The next prime is 33639989. The reversal of 33639980 is 8993633.

It is a super-2 number, since 2×33639980² = 2263296508800800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33639989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76235 + ... + 76674.

It is an arithmetic number, because the mean of its divisors is an integer number (3211110).

Almost surely, 2^33639980 is an apocalyptic number.

It is an amenable number.

33639980 is an abundant number, since it is smaller than the sum of its proper divisors (43426660).

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

33639980 is a wasteful number, since it uses less digits than its factorization.

33639980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152929 (or 152927 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 33639980 is about 5799.9982758618. The cubic root of 33639980 is about 322.8136643434.

The spelling of 33639980 in words is "thirty-three million, six hundred thirty-nine thousand, nine hundred eighty".