78446804 has 6 divisors (see below), whose sum is σ = 137281914. Its totient is φ = 39223400.

The previous prime is 78446783. The next prime is 78446821. The reversal of 78446804 is 40864487.

It can be written as a sum of positive squares in only one way, i.e., 51093904 + 27352900 = 7148^2 + 5230^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9805847 + ... + 9805854.

It is an arithmetic number, because the mean of its divisors is an integer number (22880319).

Almost surely, 2^78446804 is an apocalyptic number.

It is an amenable number.

78446804 is a deficient number, since it is larger than the sum of its proper divisors (58835110).

78446804 is a wasteful number, since it uses less digits than its factorization.

78446804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19611705 (or 19611703 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 78446804 is about 8857.0200406231. The cubic root of 78446804 is about 428.0801448309.

The spelling of 78446804 in words is "seventy-eight million, four hundred forty-six thousand, eight hundred four".