33821972 has 6 divisors (see below), whose sum is σ = 59188458. Its totient is φ = 16910984.

The previous prime is 33821969. The next prime is 33821981. The reversal of 33821972 is 27912833.

It can be written as a sum of positive squares in only one way, i.e., 29964676 + 3857296 = 5474^2 + 1964^2 .

It is a super-2 number, since 2×33821972² = 2287851579937568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4227743 + ... + 4227750.

It is an arithmetic number, because the mean of its divisors is an integer number (9864743).

Almost surely, 2^33821972 is an apocalyptic number.

It is an amenable number.

33821972 is a deficient number, since it is larger than the sum of its proper divisors (25366486).

33821972 is a wasteful number, since it uses less digits than its factorization.

33821972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8455497 (or 8455495 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 33821972 is about 5815.6660839495. Note that the first 3 decimals coincide. The cubic root of 33821972 is about 323.3947574050.

The spelling of 33821972 in words is "thirty-three million, eight hundred twenty-one thousand, nine hundred seventy-two".