33978982 has 4 divisors (see below), whose sum is σ = 50968476. Its totient is φ = 16989490.

The previous prime is 33978947. The next prime is 33979009. The reversal of 33978982 is 28987933.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) 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 as a sum of consecutive naturals, namely, 8494744 + ... + 8494747.

It is an arithmetic number, because the mean of its divisors is an integer number (12742119).

Almost surely, 2^33978982 is an apocalyptic number.

33978982 is a deficient number, since it is larger than the sum of its proper divisors (16989494).

33978982 is a wasteful number, since it uses less digits than its factorization.

33978982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16989493.

The product of its digits is 653184, while the sum is 49.

The square root of 33978982 is about 5829.1493375964. The cubic root of 33978982 is about 323.8944113079.

The spelling of 33978982 in words is "thirty-three million, nine hundred seventy-eight thousand, nine hundred eighty-two".