628490347 has 4 divisors (see below), whose sum is σ = 632346280. Its totient is φ = 624634416.

The previous prime is 628490339. The next prime is 628490371. The reversal of 628490347 is 743094826.

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 628490347 - 2³ = 628490339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628490147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1927722 + ... + 1928047.

It is an arithmetic number, because the mean of its divisors is an integer number (158086570).

Almost surely, 2^628490347 is an apocalyptic number.

628490347 is a deficient number, since it is larger than the sum of its proper divisors (3855933).

628490347 is a wasteful number, since it uses less digits than its factorization.

628490347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855932.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 628490347 is about 25069.7097510123. The cubic root of 628490347 is about 856.5765955927.

The spelling of 628490347 in words is "six hundred twenty-eight million, four hundred ninety thousand, three hundred forty-seven".