78246568 has 8 divisors (see below), whose sum is σ = 146712330. Its totient is φ = 39123280.

The previous prime is 78246559. The next prime is 78246589. The reversal of 78246568 is 86564287.

It can be written as a sum of positive squares in only one way, i.e., 72965764 + 5280804 = 8542^2 + 2298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×78246568² = 12245050807557248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4890403 + ... + 4890418.

Almost surely, 2^78246568 is an apocalyptic number.

It is an amenable number.

78246568 is a deficient number, since it is larger than the sum of its proper divisors (68465762).

78246568 is a wasteful number, since it uses less digits than its factorization.

78246568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9780827 (or 9780823 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 78246568 is about 8845.7090162406. The cubic root of 78246568 is about 427.7156086687.

The spelling of 78246568 in words is "seventy-eight million, two hundred forty-six thousand, five hundred sixty-eight".