64802020 has 12 divisors (see below), whose sum is σ = 136084284. Its totient is φ = 25920800.

The previous prime is 64801999. The next prime is 64802021. The reversal of 64802020 is 2020846.

It can be written as a sum of positive squares in 2 ways, for example, as 42068196 + 22733824 = 6486^2 + 4768^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64801982 and 64802000.

It is not an unprimeable number, because it can be changed into a prime (64802021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620031 + ... + 1620070.

It is an arithmetic number, because the mean of its divisors is an integer number (11340357).

Almost surely, 2^64802020 is an apocalyptic number.

It is an amenable number.

64802020 is an abundant number, since it is smaller than the sum of its proper divisors (71282264).

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

64802020 is a wasteful number, since it uses less digits than its factorization.

64802020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240110 (or 3240108 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 64802020 is about 8049.9701862802. The cubic root of 64802020 is about 401.6639436311.

Adding to 64802020 its reverse (2020846), we get a palindrome (66822866).

The spelling of 64802020 in words is "sixty-four million, eight hundred two thousand, twenty".