33130440 has 96 divisors (see below), whose sum is σ = 123065280. Its totient is φ = 7572096.

The previous prime is 33130417. The next prime is 33130451. The reversal of 33130440 is 4403133.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4054 + ... + 9093.

It is an arithmetic number, because the mean of its divisors is an integer number (1281930).

Almost surely, 2^33130440 is an apocalyptic number.

33130440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33130440 is an abundant number, since it is smaller than the sum of its proper divisors (89934840).

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

33130440 is a wasteful number, since it uses less digits than its factorization.

33130440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13171 (or 13164 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 33130440 is about 5755.9047942092. The cubic root of 33130440 is about 321.1754943368.

Adding to 33130440 its reverse (4403133), we get a palindrome (37533573).

The spelling of 33130440 in words is "thirty-three million, one hundred thirty thousand, four hundred forty".