628915378 has 32 divisors (see below), whose sum is σ = 1162385280. Its totient is φ = 248520960.

The previous prime is 628915327. The next prime is 628915379. The reversal of 628915378 is 873519826.

It is not an unprimeable number, because it can be changed into a prime (628915379) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 246433 + ... + 248971.

It is an arithmetic number, because the mean of its divisors is an integer number (36324540).

Almost surely, 2^628915378 is an apocalyptic number.

628915378 is a deficient number, since it is larger than the sum of its proper divisors (533469902).

628915378 is a wasteful number, since it uses less digits than its factorization.

628915378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3922.

The product of its digits is 725760, while the sum is 49.

The square root of 628915378 is about 25078.1853011736. The cubic root of 628915378 is about 856.7696452653.

The spelling of 628915378 in words is "six hundred twenty-eight million, nine hundred fifteen thousand, three hundred seventy-eight".