30494238720 has 768 divisors, whose sum is σ = 114124308480. Its totient is φ = 6881280000.

The previous prime is 30494238707. The next prime is 30494238721. The reversal of 30494238720 is 2783249403.

It is a tau number, because it is divible by the number of its divisors (768).

It is a super-2 number, since 2×30494238720² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30494238721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 429496285 + ... + 429496355.

It is an arithmetic number, because the mean of its divisors is an integer number (148599360).

Almost surely, 2^30494238720 is an apocalyptic number.

30494238720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30494238720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57062154240).

30494238720 is an abundant number, since it is smaller than the sum of its proper divisors (83630069760).

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

30494238720 is a wasteful number, since it uses less digits than its factorization.

30494238720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 30494238720 in words is "thirty billion, four hundred ninety-four million, two hundred thirty-eight thousand, seven hundred twenty".