33381140 has 24 divisors (see below), whose sum is σ = 75493320. Its totient is φ = 12325248.

The previous prime is 33381133. The next prime is 33381169. The reversal of 33381140 is 4118333.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7043716 + 26337424 = 2654^2 + 5132^2 .

It is a super-2 number, since 2×33381140² = 2228601015399200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63935 + ... + 64454.

It is an arithmetic number, because the mean of its divisors is an integer number (3145555).

Almost surely, 2^33381140 is an apocalyptic number.

It is an amenable number.

33381140 is an abundant number, since it is smaller than the sum of its proper divisors (42112180).

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

33381140 is a wasteful number, since it uses less digits than its factorization.

33381140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128411 (or 128409 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 33381140 is about 5777.6413872791. The cubic root of 33381140 is about 321.9835774709.

Adding to 33381140 its reverse (4118333), we get a palindrome (37499473).

It can be divided in two parts, 33 and 381140, that multiplied together give a triangular number (12577620 = T₅₀₁₅).

The spelling of 33381140 in words is "thirty-three million, three hundred eighty-one thousand, one hundred forty".