64628756 has 6 divisors (see below), whose sum is σ = 113100330. Its totient is φ = 32314376.

The previous prime is 64628723. The next prime is 64628779. The reversal of 64628756 is 65782646.

It can be written as a sum of positive squares in only one way, i.e., 41396356 + 23232400 = 6434^2 + 4820^2 .

It is a super-2 number, since 2×64628756² = 8353752204215072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 8078591 + ... + 8078598.

It is an arithmetic number, because the mean of its divisors is an integer number (18850055).

Almost surely, 2^64628756 is an apocalyptic number.

It is an amenable number.

64628756 is a deficient number, since it is larger than the sum of its proper divisors (48471574).

64628756 is a wasteful number, since it uses less digits than its factorization.

64628756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16157193 (or 16157191 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 64628756 is about 8039.2012040998. The cubic root of 64628756 is about 401.3056419442.

The spelling of 64628756 in words is "sixty-four million, six hundred twenty-eight thousand, seven hundred fifty-six".