678634148 has 6 divisors (see below), whose sum is σ = 1187609766. Its totient is φ = 339317072.

The previous prime is 678634141. The next prime is 678634163. The reversal of 678634148 is 841436876.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 367182244 + 311451904 = 19162^2 + 17648^2 .

It is not an unprimeable number, because it can be changed into a prime (678634141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84829265 + ... + 84829272.

It is an arithmetic number, because the mean of its divisors is an integer number (197934961).

Almost surely, 2^678634148 is an apocalyptic number.

It is an amenable number.

678634148 is a deficient number, since it is larger than the sum of its proper divisors (508975618).

678634148 is a wasteful number, since it uses less digits than its factorization.

678634148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169658541 (or 169658539 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The square root of 678634148 is about 26050.6074401347. The cubic root of 678634148 is about 878.7767732616.

The spelling of 678634148 in words is "six hundred seventy-eight million, six hundred thirty-four thousand, one hundred forty-eight".