33642138 has 8 divisors (see below), whose sum is σ = 67284288. Its totient is φ = 11214044.

The previous prime is 33642127. The next prime is 33642197. The reversal of 33642138 is 83124633.

It is a sphenic number, since it is the product of 3 distinct primes.

33642138 is an admirable number.

It is a super-2 number, since 2×33642138² = 2263586898422088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2803506 + ... + 2803517.

It is an arithmetic number, because the mean of its divisors is an integer number (8410536).

Almost surely, 2^33642138 is an apocalyptic number.

33642138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

33642138 is a wasteful number, since it uses less digits than its factorization.

33642138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5607028.

The product of its digits is 10368, while the sum is 30.

The square root of 33642138 is about 5800.1843074164. The cubic root of 33642138 is about 322.8205670129.

The spelling of 33642138 in words is "thirty-three million, six hundred forty-two thousand, one hundred thirty-eight".