628577999 has 16 divisors (see below), whose sum is σ = 736876800. Its totient is φ = 524966400.

The previous prime is 628577993. The next prime is 628578001. The reversal of 628577999 is 999775826.

It is not a de Polignac number, because 628577999 - 2⁸ = 628577743 is a prime.

It is a super-2 number, since 2×628577999² = 790220601653688002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628577993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132824 + ... + 137474.

It is an arithmetic number, because the mean of its divisors is an integer number (46054800).

Almost surely, 2^628577999 is an apocalyptic number.

628577999 is a deficient number, since it is larger than the sum of its proper divisors (108298801).

628577999 is a wasteful number, since it uses less digits than its factorization.

628577999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150.

The product of its digits is 17146080, while the sum is 62.

The square root of 628577999 is about 25071.4578554978. The cubic root of 628577999 is about 856.6164143754.

The spelling of 628577999 in words is "six hundred twenty-eight million, five hundred seventy-seven thousand, nine hundred ninety-nine".