64710020 has 96 divisors (see below), whose sum is σ = 149990400. Its totient is φ = 23385600.

The previous prime is 64710001. The next prime is 64710043. The reversal of 64710020 is 2001746.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 64709974 and 64710001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1060790 + ... + 1060850.

It is an arithmetic number, because the mean of its divisors is an integer number (1562400).

Almost surely, 2^64710020 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 64710020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74995200).

64710020 is an abundant number, since it is smaller than the sum of its proper divisors (85280380).

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

64710020 is a wasteful number, since it uses less digits than its factorization.

64710020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 64710020 is about 8044.2538497986. The cubic root of 64710020 is about 401.4737716573.

Adding to 64710020 its reverse (2001746), we get a palindrome (66711766).

The spelling of 64710020 in words is "sixty-four million, seven hundred ten thousand, twenty".