628889240291 has 16 divisors (see below), whose sum is σ = 723450559104. Its totient is φ = 541530200064.

The previous prime is 628889240261. The next prime is 628889240299. The reversal of 628889240291 is 192042988826.

It is a cyclic number.

It is not a de Polignac number, because 628889240291 - 2³⁴ = 611709371107 is a prime.

It is a super-2 number, since 2×628889240291² (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 628889240291.

It is not an unprimeable number, because it can be changed into a prime (628889240299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12566411 + ... + 12616356.

It is an arithmetic number, because the mean of its divisors is an integer number (45215659944).

Almost surely, 2^628889240291 is an apocalyptic number.

628889240291 is a deficient number, since it is larger than the sum of its proper divisors (94561318813).

628889240291 is a wasteful number, since it uses less digits than its factorization.

628889240291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25182910.

The product of its (nonzero) digits is 7962624, while the sum is 59.

The spelling of 628889240291 in words is "six hundred twenty-eight billion, eight hundred eighty-nine million, two hundred forty thousand, two hundred ninety-one".