33989910 has 16 divisors (see below), whose sum is σ = 81575856. Its totient is φ = 9063968.

The previous prime is 33989903. The next prime is 33989933. The reversal of 33989910 is 1998933.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566469 + ... + 566528.

It is an arithmetic number, because the mean of its divisors is an integer number (5098491).

Almost surely, 2^33989910 is an apocalyptic number.

33989910 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

33989910 is an abundant number, since it is smaller than the sum of its proper divisors (47585946).

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

33989910 is a wasteful number, since it uses less digits than its factorization.

33989910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133007.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 33989910 is about 5830.0866202828. The cubic root of 33989910 is about 323.9291302090.

The spelling of 33989910 in words is "thirty-three million, nine hundred eighty-nine thousand, nine hundred ten".