678277998 has 48 divisors (see below), whose sum is σ = 1553170320. Its totient is φ = 213331968.

The previous prime is 678277927. The next prime is 678278011. The reversal of 678277998 is 899772876.

It is a super-4 number, since 4×678277998⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84036 + ... + 91752.

It is an arithmetic number, because the mean of its divisors is an integer number (32357715).

Almost surely, 2^678277998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678277998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (776585160).

678277998 is an abundant number, since it is smaller than the sum of its proper divisors (874892322).

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

678277998 is a wasteful number, since it uses less digits than its factorization.

678277998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8001 (or 7998 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 63.

The square root of 678277998 is about 26043.7708099269. The cubic root of 678277998 is about 878.6230178029.

The spelling of 678277998 in words is "six hundred seventy-eight million, two hundred seventy-seven thousand, nine hundred ninety-eight".