628123872 has 48 divisors (see below), whose sum is σ = 1653078672. Its totient is φ = 208834560.

The previous prime is 628123849. The next prime is 628123879. The reversal of 628123872 is 278321826.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 628123872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628123879) 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, 29872 + ... + 46352.

It is an arithmetic number, because the mean of its divisors is an integer number (34439139).

Almost surely, 2^628123872 is an apocalyptic number.

It is an amenable number.

628123872 is an abundant number, since it is smaller than the sum of its proper divisors (1024954800).

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

628123872 is a wasteful number, since it uses less digits than its factorization.

628123872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16891 (or 16883 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 628123872 is about 25062.3995658836. The cubic root of 628123872 is about 856.4100722489.

The spelling of 628123872 in words is "six hundred twenty-eight million, one hundred twenty-three thousand, eight hundred seventy-two".