628980447 has 4 divisors (see below), whose sum is σ = 838640600. Its totient is φ = 419320296.

The previous prime is 628980437. The next prime is 628980493. The reversal of 628980447 is 744089826.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 628980447 - 2¹⁶ = 628914911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628980396 and 628980405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628980437) 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, 104830072 + ... + 104830077.

It is an arithmetic number, because the mean of its divisors is an integer number (209660150).

Almost surely, 2^628980447 is an apocalyptic number.

628980447 is a deficient number, since it is larger than the sum of its proper divisors (209660153).

628980447 is a wasteful number, since it uses less digits than its factorization.

628980447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209660152.

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 628980447 is about 25079.4825903566. The cubic root of 628980447 is about 856.7991920181.

It can be divided in two parts, 6289 and 80447, that added together give a triangular number (86736 = T₄₁₆).

The spelling of 628980447 in words is "six hundred twenty-eight million, nine hundred eighty thousand, four hundred forty-seven".