33728635820 has 48 divisors (see below), whose sum is σ = 77292811008. Its totient is φ = 12261216960.

The previous prime is 33728635819. The next prime is 33728635879. The reversal of 33728635820 is 2853682733.

It is a super-2 number, since 2×33728635820² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 758729 + ... + 801951.

It is an arithmetic number, because the mean of its divisors is an integer number (1610266896).

Almost surely, 2^33728635820 is an apocalyptic number.

It is an amenable number.

33728635820 is an abundant number, since it is smaller than the sum of its proper divisors (43564175188).

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

33728635820 is a wasteful number, since it uses less digits than its factorization.

33728635820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46790 (or 46788 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 33728635820 in words is "thirty-three billion, seven hundred twenty-eight million, six hundred thirty-five thousand, eight hundred twenty".