33978732 has 12 divisors (see below), whose sum is σ = 79283736. Its totient is φ = 11326240.

The previous prime is 33978731. The next prime is 33978781. The reversal of 33978732 is 23787933.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (33978731) 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, 1415769 + ... + 1415792.

It is an arithmetic number, because the mean of its divisors is an integer number (6606978).

Almost surely, 2^33978732 is an apocalyptic number.

It is an amenable number.

33978732 is an abundant number, since it is smaller than the sum of its proper divisors (45305004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33978732 is a wasteful number, since it uses less digits than its factorization.

33978732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831568 (or 2831566 counting only the distinct ones).

The product of its digits is 190512, while the sum is 42.

The square root of 33978732 is about 5829.1278936047. The cubic root of 33978732 is about 323.8936169561.

The spelling of 33978732 in words is "thirty-three million, nine hundred seventy-eight thousand, seven hundred thirty-two".