33139956 has 24 divisors (see below), whose sum is σ = 78387904. Its totient is φ = 10895040.

The previous prime is 33139949. The next prime is 33139969. The reversal of 33139956 is 65993133.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18040 + ... + 19791.

Almost surely, 2^33139956 is an apocalyptic number.

It is an amenable number.

33139956 is an abundant number, since it is smaller than the sum of its proper divisors (45247948).

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

33139956 is a wasteful number, since it uses less digits than its factorization.

33139956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37911 (or 37909 counting only the distinct ones).

The product of its digits is 65610, while the sum is 39.

The square root of 33139956 is about 5756.7313642379. The cubic root of 33139956 is about 321.2062416237.

The spelling of 33139956 in words is "thirty-three million, one hundred thirty-nine thousand, nine hundred fifty-six".