628987208640 has 112 divisors (see below), whose sum is σ = 2282325038592. Its totient is φ = 143768503296.

The previous prime is 628987208627. The next prime is 628987208659. The reversal of 628987208640 is 46802789826.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46792924 + ... + 46806363.

Almost surely, 2^628987208640 is an apocalyptic number.

628987208640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

628987208640 is an abundant number, since it is smaller than the sum of its proper divisors (1653337829952).

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

628987208640 is a wasteful number, since it uses less digits than its factorization.

628987208640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93599314 (or 93599304 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 60.

The spelling of 628987208640 in words is "six hundred twenty-eight billion, nine hundred eighty-seven million, two hundred eight thousand, six hundred forty".