628123704638 has 8 divisors (see below), whose sum is σ = 997608236832. Its totient is φ = 295587625696.

The previous prime is 628123704623. The next prime is 628123704661. The reversal of 628123704638 is 836407321826.

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

It is a super-2 number, since 2×628123704638² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9237113270 + ... + 9237113337.

It is an arithmetic number, because the mean of its divisors is an integer number (124701029604).

Almost surely, 2^628123704638 is an apocalyptic number.

628123704638 is a deficient number, since it is larger than the sum of its proper divisors (369484532194).

628123704638 is a wasteful number, since it uses less digits than its factorization.

628123704638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18474226626.

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 628123704638 in words is "six hundred twenty-eight billion, one hundred twenty-three million, seven hundred four thousand, six hundred thirty-eight".