64628646 has 32 divisors (see below), whose sum is σ = 135928800. Its totient is φ = 20455680.

The previous prime is 64628623. The next prime is 64628647. The reversal of 64628646 is 64682646.

It is a junction number, because it is equal to n+sod(n) for n = 64628598 and 64628607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64628647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7570 + ... + 13658.

It is an arithmetic number, because the mean of its divisors is an integer number (4247775).

Almost surely, 2^64628646 is an apocalyptic number.

64628646 is an abundant number, since it is smaller than the sum of its proper divisors (71300154).

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

64628646 is a wasteful number, since it uses less digits than its factorization.

64628646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6184.

The product of its digits is 331776, while the sum is 42.

The square root of 64628646 is about 8039.1943626212. The cubic root of 64628646 is about 401.3054142661.

It can be divided in two parts, 646 and 28646, that added together give a palindrome (29292).

The spelling of 64628646 in words is "sixty-four million, six hundred twenty-eight thousand, six hundred forty-six".