33888981 has 8 divisors (see below), whose sum is σ = 51640384. Its totient is φ = 19365120.

The previous prime is 33888961. The next prime is 33888997. The reversal of 33888981 is 18988833.

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 33888981 - 2⁵ = 33888949 is a prime.

It is a super-2 number, since 2×33888981² = 2296926066436722, 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 33888981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33888931) 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, 806860 + ... + 806901.

It is an arithmetic number, because the mean of its divisors is an integer number (6455048).

Almost surely, 2^33888981 is an apocalyptic number.

It is an amenable number.

33888981 is a deficient number, since it is larger than the sum of its proper divisors (17751403).

33888981 is a wasteful number, since it uses less digits than its factorization.

33888981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613771.

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

The square root of 33888981 is about 5821.4243102526. The cubic root of 33888981 is about 323.6081893098.

The spelling of 33888981 in words is "thirty-three million, eight hundred eighty-eight thousand, nine hundred eighty-one".