78471770 has 48 divisors (see below), whose sum is σ = 155740320. Its totient is φ = 28446912.

The previous prime is 78471763. The next prime is 78471781. The reversal of 78471770 is 7717487.

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 in 23 ways as a sum of consecutive naturals, for example, 99317 + ... + 100103.

It is an arithmetic number, because the mean of its divisors is an integer number (3244590).

Almost surely, 2^78471770 is an apocalyptic number.

78471770 is a deficient number, since it is larger than the sum of its proper divisors (77268550).

78471770 is a wasteful number, since it uses less digits than its factorization.

78471770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 76832, while the sum is 41.

The square root of 78471770 is about 8858.4293190159. The cubic root of 78471770 is about 428.1255527370.

The spelling of 78471770 in words is "seventy-eight million, four hundred seventy-one thousand, seven hundred seventy".