115021620 has 336 divisors, whose sum is σ = 440697600. Its totient is φ = 25147584.

The previous prime is 115021561. The next prime is 115021651. The reversal of 115021620 is 26120511.

115021620 is a `hidden beast` number, since 1 + 1 + 502 + 162 + 0 = 666.

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 = 115021593 and 115021602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 5000929 + ... + 5000951.

It is an arithmetic number, because the mean of its divisors is an integer number (1311600).

Almost surely, 2^115021620 is an apocalyptic number.

115021620 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 115021620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220348800).

115021620 is an abundant number, since it is smaller than the sum of its proper divisors (325675980).

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

115021620 is an equidigital number, since it uses as much as digits as its factorization.

115021620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 40 counting only the distinct ones).

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

The square root of 115021620 is about 10724.8132850880. The cubic root of 115021620 is about 486.3248856498.

The spelling of 115021620 in words is "one hundred fifteen million, twenty-one thousand, six hundred twenty".