78471856 has 10 divisors (see below), whose sum is σ = 152039252. Its totient is φ = 39235920.

The previous prime is 78471851. The next prime is 78471859. The reversal of 78471856 is 65817487.

It is not an unprimeable number, because it can be changed into a prime (78471851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2452230 + ... + 2452261.

Almost surely, 2^78471856 is an apocalyptic number.

It is an amenable number.

78471856 is a deficient number, since it is larger than the sum of its proper divisors (73567396).

78471856 is a wasteful number, since it uses less digits than its factorization.

78471856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4904499 (or 4904493 counting only the distinct ones).

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

The square root of 78471856 is about 8858.4341731482. The cubic root of 78471856 is about 428.1257091362.

The spelling of 78471856 in words is "seventy-eight million, four hundred seventy-one thousand, eight hundred fifty-six".