628459431 has 8 divisors (see below), whose sum is σ = 838113024. Its totient is φ = 418889400.

The previous prime is 628459427. The next prime is 628459459. The reversal of 628459431 is 134954826.

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

It is not a de Polignac number, because 628459431 - 2² = 628459427 is a prime.

It is a super-2 number, since 2×628459431² = 789922512825687522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628459421) 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, 495 + ... + 35456.

It is an arithmetic number, because the mean of its divisors is an integer number (104764128).

Almost surely, 2^628459431 is an apocalyptic number.

628459431 is a deficient number, since it is larger than the sum of its proper divisors (209653593).

628459431 is a wasteful number, since it uses less digits than its factorization.

628459431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41781.

The product of its digits is 207360, while the sum is 42.

The square root of 628459431 is about 25069.0931427525. The cubic root of 628459431 is about 856.5625501072.

The spelling of 628459431 in words is "six hundred twenty-eight million, four hundred fifty-nine thousand, four hundred thirty-one".