64305620 has 12 divisors (see below), whose sum is σ = 135041844. Its totient is φ = 25722240.

The previous prime is 64305617. The next prime is 64305641. The reversal of 64305620 is 2650346.

It can be written as a sum of positive squares in 2 ways, for example, as 14122564 + 50183056 = 3758^2 + 7084^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64305620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1607621 + ... + 1607660.

It is an arithmetic number, because the mean of its divisors is an integer number (11253487).

Almost surely, 2^64305620 is an apocalyptic number.

It is an amenable number.

64305620 is an abundant number, since it is smaller than the sum of its proper divisors (70736224).

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

64305620 is a wasteful number, since it uses less digits than its factorization.

64305620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215290 (or 3215288 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 64305620 is about 8019.0785006757. The cubic root of 64305620 is about 400.6356975198.

Adding to 64305620 its reverse (2650346), we get a palindrome (66955966).

The spelling of 64305620 in words is "sixty-four million, three hundred five thousand, six hundred twenty".