33989638 has 8 divisors (see below), whose sum is σ = 51023088. Its totient is φ = 16981944.

The previous prime is 33989629. The next prime is 33989639. The reversal of 33989638 is 83698933.

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

It is a junction number, because it is equal to n+sod(n) for n = 33989591 and 33989600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33989639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2706 + ... + 8677.

It is an arithmetic number, because the mean of its divisors is an integer number (6377886).

Almost surely, 2^33989638 is an apocalyptic number.

33989638 is a deficient number, since it is larger than the sum of its proper divisors (17033450).

33989638 is a wasteful number, since it uses less digits than its factorization.

33989638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12878.

The product of its digits is 839808, while the sum is 49.

The square root of 33989638 is about 5830.0632929669. The cubic root of 33989638 is about 323.9282661393.

The spelling of 33989638 in words is "thirty-three million, nine hundred eighty-nine thousand, six hundred thirty-eight".