628325031 has 8 divisors (see below), whose sum is σ = 840101760. Its totient is φ = 417715832.

The previous prime is 628324997. The next prime is 628325039. The reversal of 628325031 is 130523826.

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

It is a cyclic number.

It is not a de Polignac number, because 628325031 - 2⁶ = 628324967 is a prime.

It is a super-2 number, since 2×628325031² = 789584689162301922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 628325031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628325039) 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, 290625 + ... + 292778.

It is an arithmetic number, because the mean of its divisors is an integer number (105012720).

Almost surely, 2^628325031 is an apocalyptic number.

628325031 is a deficient number, since it is larger than the sum of its proper divisors (211776729).

628325031 is a wasteful number, since it uses less digits than its factorization.

628325031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583765.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 628325031 is about 25066.4124078417. The cubic root of 628325031 is about 856.5014853253.

Adding to 628325031 its reverse (130523826), we get a palindrome (758848857).

The spelling of 628325031 in words is "six hundred twenty-eight million, three hundred twenty-five thousand, thirty-one".