628697089 has 8 divisors (see below), whose sum is σ = 637200000. Its totient is φ = 620207952.

The previous prime is 628697087. The next prime is 628697101. The reversal of 628697089 is 980796826.

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

It is a cyclic number.

It is not a de Polignac number, because 628697089 - 2¹ = 628697087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628697087) 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, 115767 + ... + 121075.

It is an arithmetic number, because the mean of its divisors is an integer number (79650000).

Almost surely, 2^628697089 is an apocalyptic number.

It is an amenable number.

628697089 is a deficient number, since it is larger than the sum of its proper divisors (8502911).

628697089 is a wasteful number, since it uses less digits than its factorization.

628697089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6887.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The square root of 628697089 is about 25073.8327544873. The cubic root of 628697089 is about 856.6705089652.

The spelling of 628697089 in words is "six hundred twenty-eight million, six hundred ninety-seven thousand, eighty-nine".