33978142 has 16 divisors (see below), whose sum is σ = 56364912. Its totient is φ = 15232320.

The previous prime is 33978103. The next prime is 33978167. The reversal of 33978142 is 24187933.

33978142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8973 + ... + 12184.

It is an arithmetic number, because the mean of its divisors is an integer number (3522807).

Almost surely, 2^33978142 is an apocalyptic number.

33978142 is a deficient number, since it is larger than the sum of its proper divisors (22386770).

33978142 is a wasteful number, since it uses less digits than its factorization.

33978142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21243.

The product of its digits is 36288, while the sum is 37.

The square root of 33978142 is about 5829.0772854715. The cubic root of 33978142 is about 323.8917422703.

The spelling of 33978142 in words is "thirty-three million, nine hundred seventy-eight thousand, one hundred forty-two".