8628137820 has 84 divisors (see below), whose sum is σ = 27166252680. Its totient is φ = 2300832864.

The previous prime is 8628137767. The next prime is 8628137827. The reversal of 8628137820 is 287318268.

8628137820 is a `hidden beast` number, since 8 + 628 + 13 + 7 + 8 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8628137827) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 281310 + ... + 310469.

It is an arithmetic number, because the mean of its divisors is an integer number (323407770).

Almost surely, 2^8628137820 is an apocalyptic number.

It is an amenable number.

8628137820 is an abundant number, since it is smaller than the sum of its proper divisors (18538114860).

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

8628137820 is a wasteful number, since it uses less digits than its factorization.

8628137820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591806 (or 591789 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 8628137820 is about 92887.7700238304. The cubic root of 8628137820 is about 2051.0316298792.

The spelling of 8628137820 in words is "eight billion, six hundred twenty-eight million, one hundred thirty-seven thousand, eight hundred twenty".