115311420 has 216 divisors, whose sum is σ = 420297696. Its totient is φ = 25065216.

The previous prime is 115311409. The next prime is 115311421. The reversal of 115311420 is 24113511.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 115311393 and 115311402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115311421) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 666454 + ... + 666626.

Almost surely, 2^115311420 is an apocalyptic number.

115311420 is a gapful number since it is divisible by the number (10) 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 115311420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210148848).

115311420 is an abundant number, since it is smaller than the sum of its proper divisors (304986276).

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

115311420 is a wasteful number, since it uses less digits than its factorization.

115311420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 115311420 is about 10738.3155103582. The cubic root of 115311420 is about 486.7329792252.

Adding to 115311420 its reverse (24113511), we get a palindrome (139424931).

The spelling of 115311420 in words is "one hundred fifteen million, three hundred eleven thousand, four hundred twenty".