678631422 has 32 divisors (see below), whose sum is σ = 1618601472. Its totient is φ = 185464224.

The previous prime is 678631411. The next prime is 678631439. The reversal of 678631422 is 224136876.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350293 + ... + 352224.

It is an arithmetic number, because the mean of its divisors is an integer number (50581296).

Almost surely, 2^678631422 is an apocalyptic number.

678631422 is an abundant number, since it is smaller than the sum of its proper divisors (939970050).

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

678631422 is a wasteful number, since it uses less digits than its factorization.

678631422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702552.

The product of its digits is 96768, while the sum is 39.

The square root of 678631422 is about 26050.5551188454. Note that the first 3 decimals coincide. The cubic root of 678631422 is about 878.7755966096.

The spelling of 678631422 in words is "six hundred seventy-eight million, six hundred thirty-one thousand, four hundred twenty-two".