33663138 has 16 divisors (see below), whose sum is σ = 67421280. Its totient is φ = 11205216.

The previous prime is 33663137. The next prime is 33663143. The reversal of 33663138 is 83136633.

It is a super-2 number, since 2×33663138² = 2266413720014088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33663099 and 33663108.

It is not an unprimeable number, because it can be changed into a prime (33663137) 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, 1158 + ... + 8286.

It is an arithmetic number, because the mean of its divisors is an integer number (4213830).

Almost surely, 2^33663138 is an apocalyptic number.

33663138 is an abundant number, since it is smaller than the sum of its proper divisors (33758142).

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

33663138 is a wasteful number, since it uses less digits than its factorization.

33663138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7921.

The product of its digits is 23328, while the sum is 33.

The square root of 33663138 is about 5801.9943123033. The cubic root of 33663138 is about 322.8877230879.

The spelling of 33663138 in words is "thirty-three million, six hundred sixty-three thousand, one hundred thirty-eight".