33491140 has 12 divisors (see below), whose sum is σ = 70331436. Its totient is φ = 13396448.

The previous prime is 33491111. The next prime is 33491141. The reversal of 33491140 is 4119433.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26563716 + 6927424 = 5154^2 + 2632^2 .

It is a super-2 number, since 2×33491140² = 2243312916999200, which contains 22 as substring.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (33491141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837259 + ... + 837298.

It is an arithmetic number, because the mean of its divisors is an integer number (5860953).

Almost surely, 2^33491140 is an apocalyptic number.

It is an amenable number.

33491140 is an abundant number, since it is smaller than the sum of its proper divisors (36840296).

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

33491140 is a wasteful number, since it uses less digits than its factorization.

33491140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674566 (or 1674564 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 33491140 is about 5787.1530133564. The cubic root of 33491140 is about 322.3368643905.

It can be divided in two parts, 3349 and 1140, that added together give a square (4489 = 67²).

The spelling of 33491140 in words is "thirty-three million, four hundred ninety-one thousand, one hundred forty".