628860287 has 8 divisors (see below), whose sum is σ = 686796672. Its totient is φ = 571051800.

The previous prime is 628860263. The next prime is 628860289. The reversal of 628860287 is 782068826.

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

It is not a de Polignac number, because 628860287 - 2¹² = 628856191 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 (628860289) 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, 21539 + ... + 41492.

It is an arithmetic number, because the mean of its divisors is an integer number (85849584).

Almost surely, 2^628860287 is an apocalyptic number.

628860287 is a deficient number, since it is larger than the sum of its proper divisors (57936385).

628860287 is a wasteful number, since it uses less digits than its factorization.

628860287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63949.

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 628860287 is about 25077.0868922210. The cubic root of 628860287 is about 856.7446277636.

The spelling of 628860287 in words is "six hundred twenty-eight million, eight hundred sixty thousand, two hundred eighty-seven".