33440423220 has 72 divisors (see below), whose sum is σ = 101766528864. Its totient is φ = 8888384448.

The previous prime is 33440423183. The next prime is 33440423243. The reversal of 33440423220 is 2232404433.

33440423220 is a `hidden beast` number, since 3 + 3 + 4 + 404 + 232 + 20 = 666.

It is a super-2 number, since 2×33440423220² (a number of 22 digits) 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 23 ways as a sum of consecutive naturals, for example, 247314 + ... + 357833.

It is an arithmetic number, because the mean of its divisors is an integer number (1413424012).

Almost surely, 2^33440423220 is an apocalyptic number.

33440423220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33440423220 is an abundant number, since it is smaller than the sum of its proper divisors (68326105644).

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

33440423220 is a wasteful number, since it uses less digits than its factorization.

33440423220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605469 (or 605464 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 33440423220 its reverse (2232404433), we get a palindrome (35672827653).

The spelling of 33440423220 in words is "thirty-three billion, four hundred forty million, four hundred twenty-three thousand, two hundred twenty".