628044931 has 2 divisors, whose sum is σ = 628044932. Its totient is φ = 628044930.

The previous prime is 628044899. The next prime is 628044941. The reversal of 628044931 is 139440826.

628044931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628044931 - 2⁵ = 628044899 is a prime.

It is a super-2 number, since 2×628044931² = 788880870709589522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (628044941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314022465 + 314022466.

It is an arithmetic number, because the mean of its divisors is an integer number (314022466).

Almost surely, 2^628044931 is an apocalyptic number.

628044931 is a deficient number, since it is larger than the sum of its proper divisors (1).

628044931 is an equidigital number, since it uses as much as digits as its factorization.

628044931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 628044931 is about 25060.8246272943. The cubic root of 628044931 is about 856.3741936041.

The spelling of 628044931 in words is "six hundred twenty-eight million, forty-four thousand, nine hundred thirty-one".