678678948 has 54 divisors (see below), whose sum is σ = 1733341974. Its totient is φ = 223903872.

The previous prime is 678678943. The next prime is 678678961. The reversal of 678678948 is 849876876.

It can be written as a sum of positive squares in only one way, i.e., 580906404 + 97772544 = 24102^2 + 9888^2 .

It is a super-2 number, since 2×678678948² = 921210228916773408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678678941) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 381036 + ... + 382812.

Almost surely, 2^678678948 is an apocalyptic number.

It is an amenable number.

678678948 is an abundant number, since it is smaller than the sum of its proper divisors (1054663026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678678948 is a wasteful number, since it uses less digits than its factorization.

678678948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1885 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The square root of 678678948 is about 26051.4672907305. The cubic root of 678678948 is about 878.7961103047.

The spelling of 678678948 in words is "six hundred seventy-eight million, six hundred seventy-eight thousand, nine hundred forty-eight".