33878240 has 48 divisors (see below), whose sum is σ = 87318000. Its totient is φ = 12318720.

The previous prime is 33878239. The next prime is 33878249. The reversal of 33878240 is 4287833.

It is a super-2 number, since 2×33878240² = 2295470290995200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33878240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33878249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7865 + ... + 11384.

It is an arithmetic number, because the mean of its divisors is an integer number (1819125).

Almost surely, 2^33878240 is an apocalyptic number.

It is an amenable number.

33878240 is an abundant number, since it is smaller than the sum of its proper divisors (53439760).

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

33878240 is a wasteful number, since it uses less digits than its factorization.

33878240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19275 (or 19267 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 33878240 is about 5820.5016965894. The cubic root of 33878240 is about 323.5739968502.

The spelling of 33878240 in words is "thirty-three million, eight hundred seventy-eight thousand, two hundred forty".