78475256 has 8 divisors (see below), whose sum is σ = 147141120. Its totient is φ = 39237624.

The previous prime is 78475237. The next prime is 78475273. The reversal of 78475256 is 65257487.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4904696 + ... + 4904711.

It is an arithmetic number, because the mean of its divisors is an integer number (18392640).

Almost surely, 2^78475256 is an apocalyptic number.

It is an amenable number.

78475256 is a deficient number, since it is larger than the sum of its proper divisors (68665864).

78475256 is a wasteful number, since it uses less digits than its factorization.

78475256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9809413 (or 9809409 counting only the distinct ones).

The product of its digits is 470400, while the sum is 44.

The square root of 78475256 is about 8858.6260785745. The cubic root of 78475256 is about 428.1318922719.

The spelling of 78475256 in words is "seventy-eight million, four hundred seventy-five thousand, two hundred fifty-six".