628809394 has 8 divisors (see below), whose sum is σ = 973640448. Its totient is φ = 304262580.

The previous prime is 628809383. The next prime is 628809403. The reversal of 628809394 is 493908826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5070982 + ... + 5071105.

It is an arithmetic number, because the mean of its divisors is an integer number (121705056).

Almost surely, 2^628809394 is an apocalyptic number.

628809394 is a deficient number, since it is larger than the sum of its proper divisors (344831054).

628809394 is a wasteful number, since it uses less digits than its factorization.

628809394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10142120.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 628809394 is about 25076.0721405885. The cubic root of 628809394 is about 856.7215153269.

The spelling of 628809394 in words is "six hundred twenty-eight million, eight hundred nine thousand, three hundred ninety-four".