628819642 has 8 divisors (see below), whose sum is σ = 1028977632. Its totient is φ = 285827100.

The previous prime is 628819577. The next prime is 628819643. The reversal of 628819642 is 246918826.

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

It is a junction number, because it is equal to n+sod(n) for n = 628819592 and 628819601.

It is not an unprimeable number, because it can be changed into a prime (628819643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14291334 + ... + 14291377.

It is an arithmetic number, because the mean of its divisors is an integer number (128622204).

Almost surely, 2^628819642 is an apocalyptic number.

628819642 is a deficient number, since it is larger than the sum of its proper divisors (400157990).

628819642 is a wasteful number, since it uses less digits than its factorization.

628819642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28582724.

The product of its digits is 331776, while the sum is 46.

The square root of 628819642 is about 25076.2764779781. The cubic root of 628819642 is about 856.7261694317.

The spelling of 628819642 in words is "six hundred twenty-eight million, eight hundred nineteen thousand, six hundred forty-two".