33644223940 has 48 divisors (see below), whose sum is σ = 72077391792. Its totient is φ = 13188704256.

The previous prime is 33644223929. The next prime is 33644223941. The reversal of 33644223940 is 4932244633.

It can be written as a sum of positive squares in 8 ways, for example, as 351112644 + 33293111296 = 18738^2 + 182464^2 .

It is a super-2 number, since 2×33644223940² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33644223893 and 33644223902.

It is not an unprimeable number, because it can be changed into a prime (33644223941) 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 15 ways as a sum of consecutive naturals, for example, 155832 + ... + 302608.

It is an arithmetic number, because the mean of its divisors is an integer number (1501612329).

Almost surely, 2^33644223940 is an apocalyptic number.

It is an amenable number.

33644223940 is an abundant number, since it is smaller than the sum of its proper divisors (38433167852).

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

33644223940 is a wasteful number, since it uses less digits than its factorization.

33644223940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147016 (or 147014 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 40.

The spelling of 33644223940 in words is "thirty-three billion, six hundred forty-four million, two hundred twenty-three thousand, nine hundred forty".