678177872 has 20 divisors (see below), whose sum is σ = 1391262516. Its totient is φ = 319142400.

The previous prime is 678177823. The next prime is 678177883. The reversal of 678177872 is 278771876.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 548309056 + 129868816 = 23416^2 + 11396^2 .

It is a super-3 number, since 3×678177872³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1246379 + ... + 1246922.

Almost surely, 2^678177872 is an apocalyptic number.

It is an amenable number.

678177872 is an abundant number, since it is smaller than the sum of its proper divisors (713084644).

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

678177872 is a wasteful number, since it uses less digits than its factorization.

678177872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493326 (or 2493320 counting only the distinct ones).

The product of its digits is 1843968, while the sum is 53.

The square root of 678177872 is about 26041.8484750987. The cubic root of 678177872 is about 878.5797821691.

The spelling of 678177872 in words is "six hundred seventy-eight million, one hundred seventy-seven thousand, eight hundred seventy-two".