628682297 has 4 divisors (see below), whose sum is σ = 629138916. Its totient is φ = 628225680.

The previous prime is 628682291. The next prime is 628682333. The reversal of 628682297 is 792286826.

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

It can be written as a sum of positive squares in 2 ways, for example, as 504047401 + 124634896 = 22451^2 + 11164^2 .

It is a cyclic number.

It is not a de Polignac number, because 628682297 - 2¹⁸ = 628420153 is a prime.

It is a super-2 number, since 2×628682297² = 790482861122392418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628682291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226238 + ... + 228999.

It is an arithmetic number, because the mean of its divisors is an integer number (157284729).

Almost surely, 2^628682297 is an apocalyptic number.

It is an amenable number.

628682297 is a deficient number, since it is larger than the sum of its proper divisors (456619).

628682297 is a wasteful number, since it uses less digits than its factorization.

628682297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456618.

The product of its digits is 1161216, while the sum is 50.

The square root of 628682297 is about 25073.5377838868. The cubic root of 628682297 is about 856.6637903245.

The spelling of 628682297 in words is "six hundred twenty-eight million, six hundred eighty-two thousand, two hundred ninety-seven".