30642328840 has 32 divisors (see below), whose sum is σ = 68950284480. Its totient is φ = 12256034752.

The previous prime is 30642328837. The next prime is 30642328867. The reversal of 30642328840 is 4882324603.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 30642328793 and 30642328802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 928869 + ... + 961291.

It is an arithmetic number, because the mean of its divisors is an integer number (2154696390).

Almost surely, 2^30642328840 is an apocalyptic number.

It is an amenable number.

30642328840 is an abundant number, since it is smaller than the sum of its proper divisors (38307955640).

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

30642328840 is a wasteful number, since it uses less digits than its factorization.

30642328840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56061 (or 56057 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 30642328840 in words is "thirty billion, six hundred forty-two million, three hundred twenty-eight thousand, eight hundred forty".