628887423 has 4 divisors (see below), whose sum is σ = 838516568. Its totient is φ = 419258280.

The previous prime is 628887379. The next prime is 628887437. The reversal of 628887423 is 324788826.

It is a happy number.

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

It is not a de Polignac number, because 628887423 - 2¹² = 628883327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628887463) 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 3 ways as a sum of consecutive naturals, for example, 104814568 + ... + 104814573.

It is an arithmetic number, because the mean of its divisors is an integer number (209629142).

Almost surely, 2^628887423 is an apocalyptic number.

628887423 is a deficient number, since it is larger than the sum of its proper divisors (209629145).

628887423 is a wasteful number, since it uses less digits than its factorization.

628887423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209629144.

The product of its digits is 1032192, while the sum is 48.

The square root of 628887423 is about 25077.6279380646. The cubic root of 628887423 is about 856.7569507380.

The spelling of 628887423 in words is "six hundred twenty-eight million, eight hundred eighty-seven thousand, four hundred twenty-three".