8512406420 has 144 divisors (see below), whose sum is σ = 21555959040. Its totient is φ = 2813481216.

The previous prime is 8512406359. The next prime is 8512406423. The reversal of 8512406420 is 246042158.

It is a super-2 number, since 2×8512406420² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8512406423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3327782 + ... + 3330338.

It is an arithmetic number, because the mean of its divisors is an integer number (149694160).

Almost surely, 2^8512406420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8512406420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10777979520).

8512406420 is an abundant number, since it is smaller than the sum of its proper divisors (13043552620).

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

8512406420 is a wasteful number, since it uses less digits than its factorization.

8512406420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 8512406420 is about 92262.7032987870. The cubic root of 8512406420 is about 2041.8199844955.

Adding to 8512406420 its reverse (246042158), we get a palindrome (8758448578).

The spelling of 8512406420 in words is "eight billion, five hundred twelve million, four hundred six thousand, four hundred twenty".