33678940 has 24 divisors (see below), whose sum is σ = 71416800. Its totient is φ = 13339968.

The previous prime is 33678937. The next prime is 33678941. The reversal of 33678940 is 4987633.

It is a super-2 number, since 2×33678940² = 2268541999047200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33678893 and 33678902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33678941) 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, 6115 + ... + 10234.

It is an arithmetic number, because the mean of its divisors is an integer number (2975700).

Almost surely, 2^33678940 is an apocalyptic number.

It is an amenable number.

33678940 is an abundant number, since it is smaller than the sum of its proper divisors (37737860).

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

33678940 is a wasteful number, since it uses less digits than its factorization.

33678940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16461 (or 16459 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 33678940 is about 5803.3559256692. The cubic root of 33678940 is about 322.9382380225.

The spelling of 33678940 in words is "thirty-three million, six hundred seventy-eight thousand, nine hundred forty".