628418031 has 4 divisors (see below), whose sum is σ = 837890712. Its totient is φ = 418945352.

The previous prime is 628417997. The next prime is 628418051. The reversal of 628418031 is 130814826.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628418031 - 2⁶ = 628417967 is a prime.

It is a super-2 number, since 2×628418031² = 789818443371833922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 628417983 and 628418001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628418051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104736336 + ... + 104736341.

It is an arithmetic number, because the mean of its divisors is an integer number (209472678).

Almost surely, 2^628418031 is an apocalyptic number.

628418031 is a deficient number, since it is larger than the sum of its proper divisors (209472681).

628418031 is a wasteful number, since it uses less digits than its factorization.

628418031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209472680.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 628418031 is about 25068.2674112113. The cubic root of 628418031 is about 856.5437409014.

The spelling of 628418031 in words is "six hundred twenty-eight million, four hundred eighteen thousand, thirty-one".