628750381285 has 8 divisors (see below), whose sum is σ = 812538954360. Its totient is φ = 464307973824.

The previous prime is 628750381249. The next prime is 628750381381. The reversal of 628750381285 is 582183057826.

It can be written as a sum of positive squares in 4 ways, for example, as 18978368644 + 609772012641 = 137762^2 + 780879^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 628750381285 - 2²¹ = 628748284133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4836541330 + ... + 4836541459.

It is an arithmetic number, because the mean of its divisors is an integer number (101567369295).

Almost surely, 2^628750381285 is an apocalyptic number.

628750381285 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

628750381285 is a deficient number, since it is larger than the sum of its proper divisors (183788573075).

628750381285 is a wasteful number, since it uses less digits than its factorization.

628750381285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9673082807.

The product of its (nonzero) digits is 6451200, while the sum is 55.

The spelling of 628750381285 in words is "six hundred twenty-eight billion, seven hundred fifty million, three hundred eighty-one thousand, two hundred eighty-five".