33988881 has 8 divisors (see below), whose sum is σ = 45892480. Its totient is φ = 22372272.

The previous prime is 33988859. The next prime is 33988901. The reversal of 33988881 is 18888933.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 33988881 - 2⁶ = 33988817 is a prime.

It is a super-2 number, since 2×33988881² = 2310488063264322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33988881.

It is not an unprimeable number, because it can be changed into a prime (33988811) 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, 71470 + ... + 71943.

It is an arithmetic number, because the mean of its divisors is an integer number (5736560).

Almost surely, 2^33988881 is an apocalyptic number.

It is an amenable number.

33988881 is a deficient number, since it is larger than the sum of its proper divisors (11903599).

33988881 is a wasteful number, since it uses less digits than its factorization.

33988881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143495.

The product of its digits is 331776, while the sum is 48.

The square root of 33988881 is about 5829.9983704972. The cubic root of 33988881 is about 323.9258613326.

The spelling of 33988881 in words is "thirty-three million, nine hundred eighty-eight thousand, eight hundred eighty-one".