628232868381 has 16 divisors (see below), whose sum is σ = 866849911488. Its totient is φ = 404391686400.

The previous prime is 628232868377. The next prime is 628232868437. The reversal of 628232868381 is 183868232826.

It is not a de Polignac number, because 628232868381 - 2² = 628232868377 is a prime.

It is a super-2 number, since 2×628232868381² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628232868301) by changing a digit.

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, 21587580 + ... + 21616661.

It is an arithmetic number, because the mean of its divisors is an integer number (54178119468).

Almost surely, 2^628232868381 is an apocalyptic number.

It is an amenable number.

628232868381 is a deficient number, since it is larger than the sum of its proper divisors (238617043107).

628232868381 is a wasteful number, since it uses less digits than its factorization.

628232868381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43204412.

The product of its digits is 10616832, while the sum is 57.

The spelling of 628232868381 in words is "six hundred twenty-eight billion, two hundred thirty-two million, eight hundred sixty-eight thousand, three hundred eighty-one".