33915891940 has 72 divisors (see below), whose sum is σ = 82918200960. Its totient is φ = 11618970048.

The previous prime is 33915891929. The next prime is 33915891941. The reversal of 33915891940 is 4919851933.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (33915891941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1267621 + ... + 1294099.

It is an arithmetic number, because the mean of its divisors is an integer number (1151641680).

Almost surely, 2^33915891940 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 33915891940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41459100480).

33915891940 is an abundant number, since it is smaller than the sum of its proper divisors (49002309020).

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

33915891940 is a wasteful number, since it uses less digits than its factorization.

33915891940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27809 (or 27800 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 52.

The spelling of 33915891940 in words is "thirty-three billion, nine hundred fifteen million, eight hundred ninety-one thousand, nine hundred forty".