33972220 has 12 divisors (see below), whose sum is σ = 71341704. Its totient is φ = 13588880.

The previous prime is 33972217. The next prime is 33972221. The reversal of 33972220 is 2227933.

It is a super-2 number, since 2×33972220² = 2308223463456800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33972221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849286 + ... + 849325.

It is an arithmetic number, because the mean of its divisors is an integer number (5945142).

Almost surely, 2^33972220 is an apocalyptic number.

It is an amenable number.

33972220 is an abundant number, since it is smaller than the sum of its proper divisors (37369484).

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

33972220 is a wasteful number, since it uses less digits than its factorization.

33972220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698620 (or 1698618 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 33972220 is about 5828.5692927167. The cubic root of 33972220 is about 323.8729243064.

The spelling of 33972220 in words is "thirty-three million, nine hundred seventy-two thousand, two hundred twenty".