628650987 has 8 divisors (see below), whose sum is σ = 842545104. Its totient is φ = 416928768.

The previous prime is 628650983. The next prime is 628650989. The reversal of 628650987 is 789056826.

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

It is not a de Polignac number, because 628650987 - 2² = 628650983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628650983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542298 + ... + 543455.

It is an arithmetic number, because the mean of its divisors is an integer number (105318138).

Almost surely, 2^628650987 is an apocalyptic number.

628650987 is a deficient number, since it is larger than the sum of its proper divisors (213894117).

628650987 is a wasteful number, since it uses less digits than its factorization.

628650987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085949.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 628650987 is about 25072.9134126850. The cubic root of 628650987 is about 856.6495687329.

The spelling of 628650987 in words is "six hundred twenty-eight million, six hundred fifty thousand, nine hundred eighty-seven".