64620320 has 24 divisors (see below), whose sum is σ = 152665884. Its totient is φ = 25848064.

The previous prime is 64620313. The next prime is 64620329. The reversal of 64620320 is 2302646.

It can be written as a sum of positive squares in 2 ways, for example, as 63170704 + 1449616 = 7948^2 + 1204^2 .

It is not an unprimeable number, because it can be changed into a prime (64620329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201779 + ... + 202098.

Almost surely, 2^64620320 is an apocalyptic number.

It is an amenable number.

64620320 is an abundant number, since it is smaller than the sum of its proper divisors (88045564).

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

64620320 is a wasteful number, since it uses less digits than its factorization.

64620320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403892 (or 403884 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 64620320 is about 8038.6765079831. The cubic root of 64620320 is about 401.2881803584.

Adding to 64620320 its reverse (2302646), we get a palindrome (66922966).

The spelling of 64620320 in words is "sixty-four million, six hundred twenty thousand, three hundred twenty".