32821138428 has 48 divisors (see below), whose sum is σ = 83603434656. Its totient is φ = 9960468480.

The previous prime is 32821138393. The next prime is 32821138429. The reversal of 32821138428 is 82483112823.

It is a super-2 number, since 2×32821138428² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 32821138428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32821138429) 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, 1429653 + ... + 1452428.

It is an arithmetic number, because the mean of its divisors is an integer number (1741738222).

Almost surely, 2^32821138428 is an apocalyptic number.

It is an amenable number.

32821138428 is an abundant number, since it is smaller than the sum of its proper divisors (50782296228).

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

32821138428 is a wasteful number, since it uses less digits than its factorization.

32821138428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882174 (or 2882172 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The spelling of 32821138428 in words is "thirty-two billion, eight hundred twenty-one million, one hundred thirty-eight thousand, four hundred twenty-eight".