628006505 has 8 divisors (see below), whose sum is σ = 861266112. Its totient is φ = 430633008.

The previous prime is 628006459. The next prime is 628006507. The reversal of 628006505 is 505600826.

It is a happy number.

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 628006505 - 2⁶ = 628006441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628006507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8971487 + ... + 8971556.

It is an arithmetic number, because the mean of its divisors is an integer number (107658264).

Almost surely, 2^628006505 is an apocalyptic number.

It is an amenable number.

628006505 is a deficient number, since it is larger than the sum of its proper divisors (233259607).

628006505 is a wasteful number, since it uses less digits than its factorization.

628006505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17943055.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 628006505 is about 25060.0579608268. The cubic root of 628006505 is about 856.3567279185.

The spelling of 628006505 in words is "six hundred twenty-eight million, six thousand, five hundred five".