30291380028 has 192 divisors, whose sum is σ = 102342481920. Its totient is φ = 7518956544.

The previous prime is 30291380023. The next prime is 30291380051. The reversal of 30291380028 is 82008319203.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 30291379974 and 30291380001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30291380023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76425 + ... + 257727.

It is an arithmetic number, because the mean of its divisors is an integer number (533033760).

Almost surely, 2^30291380028 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 30291380028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51171240960).

30291380028 is an abundant number, since it is smaller than the sum of its proper divisors (72051101892).

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

30291380028 is a wasteful number, since it uses less digits than its factorization.

30291380028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181353 (or 181345 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 30291380028 in words is "thirty billion, two hundred ninety-one million, three hundred eighty thousand, twenty-eight".