30388137984 has 104 divisors (see below), whose sum is σ = 90028263920. Its totient is φ = 10129342464.

The previous prime is 30388137961. The next prime is 30388138003. The reversal of 30388137984 is 48973188303.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 30388137984.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26797 + ... + 247980.

Almost surely, 2^30388137984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30388137984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45014131960).

30388137984 is an abundant number, since it is smaller than the sum of its proper divisors (59640125936).

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

30388137984 is an equidigital number, since it uses as much as digits as its factorization.

30388137984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274810 (or 274782 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 30388137984 in words is "thirty billion, three hundred eighty-eight million, one hundred thirty-seven thousand, nine hundred eighty-four".