33731138 has 8 divisors (see below), whose sum is σ = 57824832. Its totient is φ = 14456196.

The previous prime is 33731129. The next prime is 33731141. The reversal of 33731138 is 83113733.

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

It is a super-2 number, since 2×33731138² = 2275579341550088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33731138.

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, 1204670 + ... + 1204697.

It is an arithmetic number, because the mean of its divisors is an integer number (7228104).

Almost surely, 2^33731138 is an apocalyptic number.

33731138 is a deficient number, since it is larger than the sum of its proper divisors (24093694).

33731138 is a wasteful number, since it uses less digits than its factorization.

33731138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409376.

The product of its digits is 4536, while the sum is 29.

The square root of 33731138 is about 5807.8514099450. The cubic root of 33731138 is about 323.1049894014.

The spelling of 33731138 in words is "thirty-three million, seven hundred thirty-one thousand, one hundred thirty-eight".