33720988 has 24 divisors (see below), whose sum is σ = 67737600. Its totient is φ = 14388528.

The previous prime is 33720977. The next prime is 33720989. The reversal of 33720988 is 88902733.

It is a happy number.

It is a super-2 number, since 2×33720988² = 2274210063392288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 33720988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33720989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4173 + ... + 9211.

It is an arithmetic number, because the mean of its divisors is an integer number (2822400).

Almost surely, 2^33720988 is an apocalyptic number.

It is an amenable number.

33720988 is an abundant number, since it is smaller than the sum of its proper divisors (34016612).

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

33720988 is a wasteful number, since it uses less digits than its factorization.

33720988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5289 (or 5287 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 33720988 is about 5806.9775270790. The cubic root of 33720988 is about 323.0725777600.

The spelling of 33720988 in words is "thirty-three million, seven hundred twenty thousand, nine hundred eighty-eight".