33669945 has 48 divisors (see below), whose sum is σ = 63659520. Its totient is φ = 16881408.

The previous prime is 33669941. The next prime is 33669959. The reversal of 33669945 is 54996633.

It is a happy number.

It is not a de Polignac number, because 33669945 - 2² = 33669941 is a prime.

It is a super-2 number, since 2×33669945² = 2267330392606050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 33669945.

It is not an unprimeable number, because it can be changed into a prime (33669941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38584 + ... + 39446.

It is an arithmetic number, because the mean of its divisors is an integer number (1326240).

Almost surely, 2^33669945 is an apocalyptic number.

It is an amenable number.

33669945 is a deficient number, since it is larger than the sum of its proper divisors (29989575).

33669945 is a wasteful number, since it uses less digits than its factorization.

33669945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 888 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 33669945 is about 5802.5808912931. The cubic root of 33669945 is about 322.9094852559.

The spelling of 33669945 in words is "thirty-three million, six hundred sixty-nine thousand, nine hundred forty-five".