78571648 has 16 divisors (see below), whose sum is σ = 156529710. Its totient is φ = 39285760.

The previous prime is 78571613. The next prime is 78571667. The reversal of 78571648 is 84617587.

It can be written as a sum of positive squares in only one way, i.e., 77299264 + 1272384 = 8792^2 + 1128^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 78571598 and 78571607.

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, 306793 + ... + 307048.

Almost surely, 2^78571648 is an apocalyptic number.

It is an amenable number.

78571648 is a deficient number, since it is larger than the sum of its proper divisors (77958062).

78571648 is an equidigital number, since it uses as much as digits as its factorization.

78571648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613855 (or 613843 counting only the distinct ones).

The product of its digits is 376320, while the sum is 46.

The square root of 78571648 is about 8864.0649817113. The cubic root of 78571648 is about 428.3071135503.

It can be divided in two parts, 78 and 571648, that multiplied together give a palindrome (44588544).

The spelling of 78571648 in words is "seventy-eight million, five hundred seventy-one thousand, six hundred forty-eight".