78947552 has 24 divisors (see below), whose sum is σ = 156555000. Its totient is φ = 39187584.

The previous prime is 78947551. The next prime is 78947579. The reversal of 78947552 is 25574987.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 78947497 and 78947506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78947551) 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 in 3 ways as a sum of consecutive naturals, for example, 4427 + ... + 13322.

It is an arithmetic number, because the mean of its divisors is an integer number (6523125).

Almost surely, 2^78947552 is an apocalyptic number.

It is an amenable number.

78947552 is a deficient number, since it is larger than the sum of its proper divisors (77607448).

78947552 is a wasteful number, since it uses less digits than its factorization.

78947552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17898 (or 17890 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The square root of 78947552 is about 8885.2434969448. The cubic root of 78947552 is about 428.9890655635.

The spelling of 78947552 in words is "seventy-eight million, nine hundred forty-seven thousand, five hundred fifty-two".