33318972 has 24 divisors (see below), whose sum is σ = 86382800. Its totient is φ = 11106288.

The previous prime is 33318959. The next prime is 33318977. The reversal of 33318972 is 27981333.

It is a happy number.

It is a super-2 number, since 2×33318972² = 2220307790273568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33318977) 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, 154147 + ... + 154362.

Almost surely, 2^33318972 is an apocalyptic number.

It is an amenable number.

33318972 is an abundant number, since it is smaller than the sum of its proper divisors (53063828).

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

33318972 is a wasteful number, since it uses less digits than its factorization.

33318972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308522 (or 308514 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 33318972 is about 5772.2588299556. The cubic root of 33318972 is about 321.7835691797.

The spelling of 33318972 in words is "thirty-three million, three hundred eighteen thousand, nine hundred seventy-two".