628397178 has 16 divisors (see below), whose sum is σ = 1257607296. Its totient is φ = 209330240.

The previous prime is 628397167. The next prime is 628397179. The reversal of 628397178 is 871793826.

628397178 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 628397178.

It is not an unprimeable number, because it can be changed into a prime (628397179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23583 + ... + 42578.

It is an arithmetic number, because the mean of its divisors is an integer number (78600456).

Almost surely, 2^628397178 is an apocalyptic number.

628397178 is an abundant number, since it is smaller than the sum of its proper divisors (629210118).

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

628397178 is a wasteful number, since it uses less digits than its factorization.

628397178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67749.

The product of its digits is 1016064, while the sum is 51.

The square root of 628397178 is about 25067.8514835237. The cubic root of 628397178 is about 856.5342664734.

The spelling of 628397178 in words is "six hundred twenty-eight million, three hundred ninety-seven thousand, one hundred seventy-eight".