115243404240 has 80 divisors (see below), whose sum is σ = 357295881600. Its totient is φ = 30728019456.

The previous prime is 115243404229. The next prime is 115243404257. The reversal of 115243404240 is 42404342511.

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 = 115243404198 and 115243404207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2547741 + ... + 2592579.

It is an arithmetic number, because the mean of its divisors is an integer number (4466198520).

Almost surely, 2^115243404240 is an apocalyptic number.

115243404240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115243404240 is an abundant number, since it is smaller than the sum of its proper divisors (242052477360).

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

115243404240 is a wasteful number, since it uses less digits than its factorization.

115243404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55564 (or 55558 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 115243404240 its reverse (42404342511), we get a palindrome (157647746751).

The spelling of 115243404240 in words is "one hundred fifteen billion, two hundred forty-three million, four hundred four thousand, two hundred forty".