30115522440 has 192 divisors, whose sum is σ = 106638537600. Its totient is φ = 7558327296.

The previous prime is 30115522421. The next prime is 30115522447. The reversal of 30115522440 is 4422551103.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (30115522447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 263877 + ... + 360363.

It is an arithmetic number, because the mean of its divisors is an integer number (555409050).

Almost surely, 2^30115522440 is an apocalyptic number.

30115522440 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 30115522440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53319268800).

30115522440 is an abundant number, since it is smaller than the sum of its proper divisors (76523015160).

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

30115522440 is a wasteful number, since it uses less digits than its factorization.

30115522440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96541 (or 96514 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 30115522440 in words is "thirty billion, one hundred fifteen million, five hundred twenty-two thousand, four hundred forty".