628769284 has 24 divisors (see below), whose sum is σ = 1292715648. Its totient is φ = 263819040.

The previous prime is 628769269. The next prime is 628769287. The reversal of 628769284 is 482967826.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (628769287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549052 + ... + 550195.

It is an arithmetic number, because the mean of its divisors is an integer number (53863152).

Almost surely, 2^628769284 is an apocalyptic number.

It is an amenable number.

628769284 is an abundant number, since it is smaller than the sum of its proper divisors (663946364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628769284 is a wasteful number, since it uses less digits than its factorization.

628769284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099275 (or 1099273 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 52.

The square root of 628769284 is about 25075.2723614321. The cubic root of 628769284 is about 856.7032989798.

The spelling of 628769284 in words is "six hundred twenty-eight million, seven hundred sixty-nine thousand, two hundred eighty-four".