628907138208 has 72 divisors (see below), whose sum is σ = 1788611138496. Its totient is φ = 209617372800.

The previous prime is 628907138203. The next prime is 628907138267. The reversal of 628907138208 is 802831709826.

It is a happy number.

628907138208 is a `hidden beast` number, since 628 + 9 + 0 + 7 + 1 + 3 + 8 + 2 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (628907138201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3427353 + ... + 3606183.

It is an arithmetic number, because the mean of its divisors is an integer number (24841821368).

Almost surely, 2^628907138208 is an apocalyptic number.

It is an amenable number.

628907138208 is an abundant number, since it is smaller than the sum of its proper divisors (1159704000288).

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

628907138208 is a wasteful number, since it uses less digits than its factorization.

628907138208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191058 (or 191047 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 628907138208 in words is "six hundred twenty-eight billion, nine hundred seven million, one hundred thirty-eight thousand, two hundred eight".