628020131 has 4 divisors (see below), whose sum is σ = 638664600. Its totient is φ = 617375664.

The previous prime is 628020109. The next prime is 628020233. The reversal of 628020131 is 131020826.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628020131 - 2¹⁰ = 628019107 is a prime.

It is a super-2 number, since 2×628020131² = 788818569882514322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628020097 and 628020106.

It is not an unprimeable number, because it can be changed into a prime (628020331) 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 3 ways as a sum of consecutive naturals, for example, 5322146 + ... + 5322263.

It is an arithmetic number, because the mean of its divisors is an integer number (159666150).

Almost surely, 2^628020131 is an apocalyptic number.

628020131 is a deficient number, since it is larger than the sum of its proper divisors (10644469).

628020131 is a wasteful number, since it uses less digits than its factorization.

628020131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10644468.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 628020131 is about 25060.3298262413. The cubic root of 628020131 is about 856.3629213959.

Adding to 628020131 its reverse (131020826), we get a palindrome (759040957).

The spelling of 628020131 in words is "six hundred twenty-eight million, twenty thousand, one hundred thirty-one".