628201409 has 8 divisors (see below), whose sum is σ = 688756800. Its totient is φ = 568220400.

The previous prime is 628201403. The next prime is 628201417. The reversal of 628201409 is 904102826.

628201409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 628201409 - 2²⁸ = 359765953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628201403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141302 + ... + 145679.

It is an arithmetic number, because the mean of its divisors is an integer number (86094600).

Almost surely, 2^628201409 is an apocalyptic number.

It is an amenable number.

628201409 is a deficient number, since it is larger than the sum of its proper divisors (60555391).

628201409 is a wasteful number, since it uses less digits than its factorization.

628201409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287191.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 628201409 is about 25063.9463971658. The cubic root of 628201409 is about 856.4453098502.

The spelling of 628201409 in words is "six hundred twenty-eight million, two hundred one thousand, four hundred nine".