30312532320240 has 160 divisors (see below), whose sum is σ = 95801268594240. Its totient is φ = 7925903884288.

The previous prime is 30312532320199. The next prime is 30312532320247. The reversal of 30312532320240 is 4202323521303.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 30312532320198 and 30312532320207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30312532320247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19778656 + ... + 21256064.

It is an arithmetic number, because the mean of its divisors is an integer number (598757928714).

Almost surely, 2^{30312532320240} is an apocalyptic number.

30312532320240 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 30312532320240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47900634297120).

30312532320240 is an abundant number, since it is smaller than the sum of its proper divisors (65488736274000).

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

30312532320240 is a wasteful number, since it uses less digits than its factorization.

30312532320240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479091 (or 1479085 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 30.

Adding to 30312532320240 its reverse (4202323521303), we get a palindrome (34514855841543).

The spelling of 30312532320240 in words is "thirty trillion, three hundred twelve billion, five hundred thirty-two million, three hundred twenty thousand, two hundred forty".