628723107 has 8 divisors (see below), whose sum is σ = 931441680. Its totient is φ = 419148720.

The previous prime is 628723099. The next prime is 628723127. The reversal of 628723107 is 701327826.

628723107 is a `hidden beast` number, since 628 + 7 + 23 + 1 + 0 + 7 = 666.

It is not a de Polignac number, because 628723107 - 2³ = 628723099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628723127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11642994 + ... + 11643047.

It is an arithmetic number, because the mean of its divisors is an integer number (116430210).

Almost surely, 2^628723107 is an apocalyptic number.

628723107 is a deficient number, since it is larger than the sum of its proper divisors (302718573).

628723107 is a wasteful number, since it uses less digits than its factorization.

628723107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23286050 (or 23286044 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 628723107 is about 25074.3515768604. The cubic root of 628723107 is about 856.6823262861.

The spelling of 628723107 in words is "six hundred twenty-eight million, seven hundred twenty-three thousand, one hundred seven".