628204441 has 4 divisors (see below), whose sum is σ = 628528384. Its totient is φ = 627880500.

The previous prime is 628204433. The next prime is 628204477. The reversal of 628204441 is 144402826.

628204441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 144402826 = 2 ⋅72201413.

It is a cyclic number.

It is not a de Polignac number, because 628204441 - 2³ = 628204433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628204411) 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, 159045 + ... + 162946.

It is an arithmetic number, because the mean of its divisors is an integer number (157132096).

Almost surely, 2^628204441 is an apocalyptic number.

It is an amenable number.

628204441 is a deficient number, since it is larger than the sum of its proper divisors (323943).

628204441 is a wasteful number, since it uses less digits than its factorization.

628204441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323942.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 628204441 is about 25064.0068823802. The cubic root of 628204441 is about 856.4466877193.

The spelling of 628204441 in words is "six hundred twenty-eight million, two hundred four thousand, four hundred forty-one".