2315630640 has 80 divisors (see below), whose sum is σ = 7196655456. Its totient is φ = 615936000.

The previous prime is 2315630623. The next prime is 2315630659. The reversal of 2315630640 is 460365132.

It is a Cunningham number, because it is equal to 48121²-1.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 2315630598 and 2315630607.

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 15 ways as a sum of consecutive naturals, for example, 84210 + ... + 108270.

Almost surely, 2^2315630640 is an apocalyptic number.

2315630640 is a gapful number since it is divisible by the number (20) 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 2315630640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3598327728).

2315630640 is an abundant number, since it is smaller than the sum of its proper divisors (4881024816).

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

2315630640 is a wasteful number, since it uses less digits than its factorization.

2315630640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24478 (or 24472 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 2315630640 is about 48120.9999896095. Note that the first 4 decimals coincide. The cubic root of 2315630640 is about 1322.9895967311.

Adding to 2315630640 its reverse (460365132), we get a palindrome (2775995772).

The spelling of 2315630640 in words is "two billion, three hundred fifteen million, six hundred thirty thousand, six hundred forty".