628572481 has 4 divisors (see below), whose sum is σ = 628623700. Its totient is φ = 628521264.

The previous prime is 628572473. The next prime is 628572509. The reversal of 628572481 is 184275826.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 581581456 + 46991025 = 24116^2 + 6855^2 .

It is a cyclic number.

It is not a de Polignac number, because 628572481 - 2³ = 628572473 is a prime.

It is a super-2 number, since 2×628572481² = 790206727740990722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628572781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4975 + ... + 35803.

It is an arithmetic number, because the mean of its divisors is an integer number (157155925).

Almost surely, 2^628572481 is an apocalyptic number.

It is an amenable number.

628572481 is a deficient number, since it is larger than the sum of its proper divisors (51219).

628572481 is a wasteful number, since it uses less digits than its factorization.

628572481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51218.

The product of its digits is 215040, while the sum is 43.

The square root of 628572481 is about 25071.3478098007. The cubic root of 628572481 is about 856.6139077529.

The spelling of 628572481 in words is "six hundred twenty-eight million, five hundred seventy-two thousand, four hundred eighty-one".