628765089 has 8 divisors (see below), whose sum is σ = 848454432. Its totient is φ = 414126240.

The previous prime is 628765073. The next prime is 628765103. The reversal of 628765089 is 980567826.

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

It is not a de Polignac number, because 628765089 - 2⁴ = 628765073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (628765069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262332 + ... + 1262829.

It is an arithmetic number, because the mean of its divisors is an integer number (106056804).

Almost surely, 2^628765089 is an apocalyptic number.

It is an amenable number.

628765089 is a deficient number, since it is larger than the sum of its proper divisors (219689343).

628765089 is a wasteful number, since it uses less digits than its factorization.

628765089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525247.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 628765089 is about 25075.1887131483. The cubic root of 628765089 is about 856.7013937349.

The spelling of 628765089 in words is "six hundred twenty-eight million, seven hundred sixty-five thousand, eighty-nine".