628427447 has 4 divisors (see below), whose sum is σ = 628642080. Its totient is φ = 628212816.

The previous prime is 628427417. The next prime is 628427453. The reversal of 628427447 is 744724826.

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 628427447 - 2²⁸ = 359991991 is a prime.

It is a super-2 number, since 2×628427447² = 789842112285875618, 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 = 628427398 and 628427407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628427417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102863 + ... + 108800.

It is an arithmetic number, because the mean of its divisors is an integer number (157160520).

Almost surely, 2^628427447 is an apocalyptic number.

628427447 is a deficient number, since it is larger than the sum of its proper divisors (214633).

628427447 is a wasteful number, since it uses less digits than its factorization.

628427447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214632.

The product of its digits is 602112, while the sum is 44.

The square root of 628427447 is about 25068.4552176635. The cubic root of 628427447 is about 856.5480189324.

The spelling of 628427447 in words is "six hundred twenty-eight million, four hundred twenty-seven thousand, four hundred forty-seven".