628442886 has 16 divisors (see below), whose sum is σ = 1268633664. Its totient is φ = 207522984.

The previous prime is 628442831. The next prime is 628442887. The reversal of 628442886 is 688244826.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628442887) 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, 488800 + ... + 490083.

It is an arithmetic number, because the mean of its divisors is an integer number (79289604).

Almost surely, 2^628442886 is an apocalyptic number.

628442886 is an abundant number, since it is smaller than the sum of its proper divisors (640190778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628442886 is a wasteful number, since it uses less digits than its factorization.

628442886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978995.

The product of its digits is 1179648, while the sum is 48.

The square root of 628442886 is about 25068.7631525770. The cubic root of 628442886 is about 856.5550333389. Note that the first 3 decimals are identical.

The spelling of 628442886 in words is "six hundred twenty-eight million, four hundred forty-two thousand, eight hundred eighty-six".