628340051 has 4 divisors (see below), whose sum is σ = 661410600. Its totient is φ = 595269504.

The previous prime is 628340021. The next prime is 628340057. The reversal of 628340051 is 150043826.

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

It is a cyclic number.

It is not a de Polignac number, because 628340051 - 2¹⁴ = 628323667 is a prime.

It is a super-2 number, since 2×628340051² = 789622439381365202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628339996 and 628340023.

It is not an unprimeable number, because it can be changed into a prime (628340057) 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, 16535246 + ... + 16535283.

It is an arithmetic number, because the mean of its divisors is an integer number (165352650).

Almost surely, 2^628340051 is an apocalyptic number.

628340051 is a deficient number, since it is larger than the sum of its proper divisors (33070549).

628340051 is a wasteful number, since it uses less digits than its factorization.

628340051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33070548.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 628340051 is about 25066.7120101540. The cubic root of 628340051 is about 856.5083101103.

Adding to 628340051 its reverse (150043826), we get a palindrome (778383877).

The spelling of 628340051 in words is "six hundred twenty-eight million, three hundred forty thousand, fifty-one".