628852521 has 8 divisors (see below), whose sum is σ = 914694624. Its totient is φ = 381122720.

The previous prime is 628852507. The next prime is 628852573. The reversal of 628852521 is 125258826.

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

It is not a de Polignac number, because 628852521 - 2⁵ = 628852489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 628852521.

It is not an unprimeable number, because it can be changed into a prime (628852121) 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, 9528036 + ... + 9528101.

It is an arithmetic number, because the mean of its divisors is an integer number (114336828).

Almost surely, 2^628852521 is an apocalyptic number.

It is an amenable number.

628852521 is a deficient number, since it is larger than the sum of its proper divisors (285842103).

628852521 is a wasteful number, since it uses less digits than its factorization.

628852521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19056151.

The product of its digits is 76800, while the sum is 39.

The square root of 628852521 is about 25076.9320491961. The cubic root of 628852521 is about 856.7411010098.

The spelling of 628852521 in words is "six hundred twenty-eight million, eight hundred fifty-two thousand, five hundred twenty-one".