33987136 has 28 divisors (see below), whose sum is σ = 67673728. Its totient is φ = 16935552.

The previous prime is 33987133. The next prime is 33987137. The reversal of 33987136 is 63178933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33987133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22765 + ... + 24211.

Almost surely, 2^33987136 is an apocalyptic number.

It is an amenable number.

33987136 is a deficient number, since it is larger than the sum of its proper divisors (33686592).

33987136 is a wasteful number, since it uses less digits than its factorization.

33987136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826 (or 1816 counting only the distinct ones).

The product of its digits is 81648, while the sum is 40.

The square root of 33987136 is about 5829.8487115876. The cubic root of 33987136 is about 323.9203177521.

The spelling of 33987136 in words is "thirty-three million, nine hundred eighty-seven thousand, one hundred thirty-six".