628502401 has 4 divisors (see below), whose sum is σ = 648776704. Its totient is φ = 608228100.

The previous prime is 628502383. The next prime is 628502417. The reversal of 628502401 is 104205826.

628502401 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.

It is a cyclic number.

It is not a de Polignac number, because 628502401 - 2¹⁷ = 628371329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 628502401.

It is not an unprimeable number, because it can be changed into a prime (628502201) 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, 10137105 + ... + 10137166.

It is an arithmetic number, because the mean of its divisors is an integer number (162194176).

Almost surely, 2^628502401 is an apocalyptic number.

It is an amenable number.

628502401 is a deficient number, since it is larger than the sum of its proper divisors (20274303).

628502401 is a wasteful number, since it uses less digits than its factorization.

628502401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20274302.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 628502401 is about 25069.9501595037. The cubic root of 628502401 is about 856.5820717353.

The spelling of 628502401 in words is "six hundred twenty-eight million, five hundred two thousand, four hundred one".