628844722500 has 60 divisors (see below), whose sum is σ = 1833543540752. Its totient is φ = 167691924000.

The previous prime is 628844722481. The next prime is 628844722501. The reversal of 628844722500 is 5227448826.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×628844722500² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 628844722500.

It is not an unprimeable number, because it can be changed into a prime (628844722501) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 41915482 + ... + 41930481.

Almost surely, 2^628844722500 is an apocalyptic number.

628844722500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

628844722500 is an abundant number, since it is smaller than the sum of its proper divisors (1204698818252).

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

628844722500 is a wasteful number, since it uses less digits than its factorization.

628844722500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83845990 (or 83845973 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 48.

The spelling of 628844722500 in words is "six hundred twenty-eight billion, eight hundred forty-four million, seven hundred twenty-two thousand, five hundred".