30168534990 has 128 divisors (see below), whose sum is σ = 81875473920. Its totient is φ = 7047129600.

The previous prime is 30168534971. The next prime is 30168535013. The reversal of 30168534990 is 9943586103.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5174457 + ... + 5180283.

It is an arithmetic number, because the mean of its divisors is an integer number (639652140).

Almost surely, 2^30168534990 is an apocalyptic number.

30168534990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30168534990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40937736960).

30168534990 is an abundant number, since it is smaller than the sum of its proper divisors (51706938930).

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

30168534990 is a wasteful number, since it uses less digits than its factorization.

30168534990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6418.

The product of its (nonzero) digits is 699840, while the sum is 48.

The spelling of 30168534990 in words is "thirty billion, one hundred sixty-eight million, five hundred thirty-four thousand, nine hundred ninety".