628860646 has 4 divisors (see below), whose sum is σ = 943290972. Its totient is φ = 314430322.

The previous prime is 628860623. The next prime is 628860647. The reversal of 628860646 is 646068826.

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

It is a junction number, because it is equal to n+sod(n) for n = 628860596 and 628860605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628860647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157215160 + ... + 157215163.

It is an arithmetic number, because the mean of its divisors is an integer number (235822743).

Almost surely, 2^628860646 is an apocalyptic number.

628860646 is a deficient number, since it is larger than the sum of its proper divisors (314430326).

628860646 is a wasteful number, since it uses less digits than its factorization.

628860646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314430325.

The product of its (nonzero) digits is 663552, while the sum is 46.

The square root of 628860646 is about 25077.0940501486. The cubic root of 628860646 is about 856.7447907946.

The spelling of 628860646 in words is "six hundred twenty-eight million, eight hundred sixty thousand, six hundred forty-six".