628989446 has 16 divisors (see below), whose sum is σ = 967776768. Its totient is φ = 306417600.

The previous prime is 628989437. The next prime is 628989457. The reversal of 628989446 is 644989826.

It is a junction number, because it is equal to n+sod(n) for n = 628989391 and 628989400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62651 + ... + 71993.

It is an arithmetic number, because the mean of its divisors is an integer number (60486048).

Almost surely, 2^628989446 is an apocalyptic number.

628989446 is a deficient number, since it is larger than the sum of its proper divisors (338787322).

628989446 is a wasteful number, since it uses less digits than its factorization.

628989446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10207.

The product of its digits is 5971968, while the sum is 56.

The square root of 628989446 is about 25079.6619993173. The cubic root of 628989446 is about 856.8032781542.

The spelling of 628989446 in words is "six hundred twenty-eight million, nine hundred eighty-nine thousand, four hundred forty-six".