628311407 has 8 divisors (see below), whose sum is σ = 640442640. Its totient is φ = 616239360.

The previous prime is 628311391. The next prime is 628311427. The reversal of 628311407 is 704113826.

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

It is a cyclic number.

It is not a de Polignac number, because 628311407 - 2⁴ = 628311391 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 (628311427) 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, 6944 + ... + 36122.

It is an arithmetic number, because the mean of its divisors is an integer number (80055330).

Almost surely, 2^628311407 is an apocalyptic number.

628311407 is a deficient number, since it is larger than the sum of its proper divisors (12131233).

628311407 is a wasteful number, since it uses less digits than its factorization.

628311407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29593.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 628311407 is about 25066.1406482929. The cubic root of 628311407 is about 856.4952947604.

The spelling of 628311407 in words is "six hundred twenty-eight million, three hundred eleven thousand, four hundred seven".