628500055 has 8 divisors (see below), whose sum is σ = 756885744. Its totient is φ = 501009600.

The previous prime is 628500053. The next prime is 628500071. The reversal of 628500055 is 550005826.

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

It is not a de Polignac number, because 628500055 - 2¹ = 628500053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628500053) 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, 222261 + ... + 225070.

It is an arithmetic number, because the mean of its divisors is an integer number (94610718).

Almost surely, 2^628500055 is an apocalyptic number.

628500055 is a deficient number, since it is larger than the sum of its proper divisors (128385689).

628500055 is a wasteful number, since it uses less digits than its factorization.

628500055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447617.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 628500055 is about 25069.9033703762. The cubic root of 628500055 is about 856.5810059510.

The spelling of 628500055 in words is "six hundred twenty-eight million, five hundred thousand, fifty-five".