8115474420 has 36 divisors (see below), whose sum is σ = 24616939620. Its totient is φ = 2164126464.

The previous prime is 8115474391. The next prime is 8115474421. The reversal of 8115474420 is 244745118.

It is a happy number.

8115474420 is a `hidden beast` number, since 81 + 154 + 7 + 4 + 420 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3934300176 + 4181174244 = 62724^2 + 64662^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8115474421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22542805 + ... + 22543164.

Almost surely, 2^8115474420 is an apocalyptic number.

It is an amenable number.

8115474420 is an abundant number, since it is smaller than the sum of its proper divisors (16501465200).

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

8115474420 is a wasteful number, since it uses less digits than its factorization.

8115474420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45085984 (or 45085979 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 8115474420 is about 90085.9279799015. The cubic root of 8115474420 is about 2009.5769362812.

The spelling of 8115474420 in words is "eight billion, one hundred fifteen million, four hundred seventy-four thousand, four hundred twenty".