65278628 has 6 divisors (see below), whose sum is σ = 114237606. Its totient is φ = 32639312.

The previous prime is 65278627. The next prime is 65278637. The reversal of 65278628 is 82687256.

It can be written as a sum of positive squares in only one way, i.e., 50239744 + 15038884 = 7088^2 + 3878^2 .

It is a super-2 number, since 2×65278628² = 8522598547124768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65278627) 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 as a sum of consecutive naturals, namely, 8159825 + ... + 8159832.

It is an arithmetic number, because the mean of its divisors is an integer number (19039601).

Almost surely, 2^65278628 is an apocalyptic number.

It is an amenable number.

65278628 is a deficient number, since it is larger than the sum of its proper divisors (48958978).

65278628 is a wasteful number, since it uses less digits than its factorization.

65278628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16319661 (or 16319659 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The square root of 65278628 is about 8079.5190450917. The cubic root of 65278628 is about 402.6462629580.

The spelling of 65278628 in words is "sixty-five million, two hundred seventy-eight thousand, six hundred twenty-eight".