33136840 has 64 divisors (see below), whose sum is σ = 82114560. Its totient is φ = 11934720.

The previous prime is 33136811. The next prime is 33136841. The reversal of 33136840 is 4863133.

It is a junction number, because it is equal to n+sod(n) for n = 33136799 and 33136808.

It is not an unprimeable number, because it can be changed into a prime (33136841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55584 + ... + 56176.

It is an arithmetic number, because the mean of its divisors is an integer number (1283040).

Almost surely, 2^33136840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33136840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41057280).

33136840 is an abundant number, since it is smaller than the sum of its proper divisors (48977720).

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

33136840 is a wasteful number, since it uses less digits than its factorization.

33136840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 33136840 is about 5756.4607181844. The cubic root of 33136840 is about 321.1961741187.

Adding to 33136840 its reverse (4863133), we get a palindrome (37999973).

It can be divided in two parts, 3313 and 6840, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 33136840 in words is "thirty-three million, one hundred thirty-six thousand, eight hundred forty".