628268131 has 4 divisors (see below), whose sum is σ = 628346664. Its totient is φ = 628189600.

The previous prime is 628268107. The next prime is 628268153. The reversal of 628268131 is 131862826.

It is a happy number.

628268131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628268131 is a prime.

It is a super-2 number, since 2×628268131² = 789441688860466322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628268101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25705 + ... + 43786.

It is an arithmetic number, because the mean of its divisors is an integer number (157086666).

Almost surely, 2^628268131 is an apocalyptic number.

628268131 is a deficient number, since it is larger than the sum of its proper divisors (78533).

628268131 is an equidigital number, since it uses as much as digits as its factorization.

628268131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78532.

The product of its digits is 27648, while the sum is 37.

The square root of 628268131 is about 25065.2773972282. The cubic root of 628268131 is about 856.4756301265.

The spelling of 628268131 in words is "six hundred twenty-eight million, two hundred sixty-eight thousand, one hundred thirty-one".