33861972 has 12 divisors (see below), whose sum is σ = 79011296. Its totient is φ = 11287320.

The previous prime is 33861907. The next prime is 33861973. The reversal of 33861972 is 27916833.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×33861972² = 2293266295457568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33861972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33861973) 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, 1410904 + ... + 1410927.

Almost surely, 2^33861972 is an apocalyptic number.

It is an amenable number.

33861972 is an abundant number, since it is smaller than the sum of its proper divisors (45149324).

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

33861972 is a wasteful number, since it uses less digits than its factorization.

33861972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821838 (or 2821836 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 33861972 is about 5819.1040547493. The cubic root of 33861972 is about 323.5221962001.

The spelling of 33861972 in words is "thirty-three million, eight hundred sixty-one thousand, nine hundred seventy-two".