628247187840 has 128 divisors (see below), whose sum is σ = 2002813182720. Its totient is φ = 167509555200.

The previous prime is 628247187823. The next prime is 628247187881. The reversal of 628247187840 is 48781742826.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17505915 + ... + 17541765.

It is an arithmetic number, because the mean of its divisors is an integer number (15646977990).

Almost surely, 2^628247187840 is an apocalyptic number.

628247187840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

628247187840 is an abundant number, since it is smaller than the sum of its proper divisors (1374565994880).

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

628247187840 is a wasteful number, since it uses less digits than its factorization.

628247187840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45000 (or 44988 counting only the distinct ones).

The product of its (nonzero) digits is 9633792, while the sum is 57.

The spelling of 628247187840 in words is "six hundred twenty-eight billion, two hundred forty-seven million, one hundred eighty-seven thousand, eight hundred forty".