30720294198 has 64 divisors (see below), whose sum is σ = 74494275840. Its totient is φ = 9306576000.

The previous prime is 30720294139. The next prime is 30720294203. The reversal of 30720294198 is 89149202703.

It is a super-2 number, since 2×30720294198² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3827886 + ... + 3835902.

It is an arithmetic number, because the mean of its divisors is an integer number (1163973060).

Almost surely, 2^30720294198 is an apocalyptic number.

30720294198 is an abundant number, since it is smaller than the sum of its proper divisors (43773981642).

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

30720294198 is a wasteful number, since it uses less digits than its factorization.

30720294198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14490 (or 14484 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 30720294198 in words is "thirty billion, seven hundred twenty million, two hundred ninety-four thousand, one hundred ninety-eight".