77198648 has 16 divisors (see below), whose sum is σ = 145383000. Its totient is φ = 38429856.

The previous prime is 77198623. The next prime is 77198651. The reversal of 77198648 is 84689177.

It is a junction number, because it is equal to n+sod(n) for n = 77198596 and 77198605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19238 + ... + 22901.

Almost surely, 2^77198648 is an apocalyptic number.

It is an amenable number.

77198648 is a deficient number, since it is larger than the sum of its proper divisors (68184352).

77198648 is a wasteful number, since it uses less digits than its factorization.

77198648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42374 (or 42370 counting only the distinct ones).

The product of its digits is 677376, while the sum is 50.

The square root of 77198648 is about 8786.2761167630. The cubic root of 77198648 is about 425.7976218441.

The spelling of 77198648 in words is "seventy-seven million, one hundred ninety-eight thousand, six hundred forty-eight".