30491858540 has 384 divisors, whose sum is σ = 85403566080. Its totient is φ = 8964172800.

The previous prime is 30491858531. The next prime is 30491858557. The reversal of 30491858540 is 4585819403.

It is a happy 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 127 ways as a sum of consecutive naturals, for example, 38744027 + ... + 38744813.

It is an arithmetic number, because the mean of its divisors is an integer number (222405120).

Almost surely, 2^30491858540 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 30491858540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42701783040).

30491858540 is an abundant number, since it is smaller than the sum of its proper divisors (54911707540).

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

30491858540 is a wasteful number, since it uses less digits than its factorization.

30491858540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 30491858540 in words is "thirty billion, four hundred ninety-one million, eight hundred fifty-eight thousand, five hundred forty".