33881240 has 16 divisors (see below), whose sum is σ = 76232880. Its totient is φ = 13552480.

The previous prime is 33881213. The next prime is 33881249. The reversal of 33881240 is 4218833.

It is a happy number.

It is a super-2 number, since 2×33881240² = 2295876847875200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33881249) 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 3 ways as a sum of consecutive naturals, for example, 423476 + ... + 423555.

It is an arithmetic number, because the mean of its divisors is an integer number (4764555).

Almost surely, 2^33881240 is an apocalyptic number.

It is an amenable number.

33881240 is an abundant number, since it is smaller than the sum of its proper divisors (42351640).

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

33881240 is a wasteful number, since it uses less digits than its factorization.

33881240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847042 (or 847038 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 33881240 is about 5820.7594006281. The cubic root of 33881240 is about 323.5835476546.

The spelling of 33881240 in words is "thirty-three million, eight hundred eighty-one thousand, two hundred forty".