8210722860 has 36 divisors (see below), whose sum is σ = 24905859888. Its totient is φ = 2189526048.

The previous prime is 8210722841. The next prime is 8210722889. The reversal of 8210722860 is 682270128.

It is a happy number.

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

It is a super-3 number, since 3×8210722860³ (a number of 31 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22807384 + ... + 22807743.

Almost surely, 2^8210722860 is an apocalyptic number.

It is an amenable number.

8210722860 is an abundant number, since it is smaller than the sum of its proper divisors (16695137028).

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

8210722860 is a wasteful number, since it uses less digits than its factorization.

8210722860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45615142 (or 45615137 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 8210722860 is about 90613.0391279313. The cubic root of 8210722860 is about 2017.4082746909.

Adding to 8210722860 its reverse (682270128), we get a palindrome (8892992988).

The spelling of 8210722860 in words is "eight billion, two hundred ten million, seven hundred twenty-two thousand, eight hundred sixty".