306630631 has 8 divisors (see below), whose sum is σ = 308113200. Its totient is φ = 305152512.

The previous prime is 306630619. The next prime is 306630637. The reversal of 306630631 is 136036603.

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 306630631 - 2¹⁹ = 306106343 is a prime.

It is a super-2 number, since 2×306630631² = 188044687734916322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 306630631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306630637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252181 + ... + 253393.

It is an arithmetic number, because the mean of its divisors is an integer number (38514150).

Almost surely, 2^306630631 is an apocalyptic number.

306630631 is a deficient number, since it is larger than the sum of its proper divisors (1482569).

306630631 is a wasteful number, since it uses less digits than its factorization.

306630631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225.

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 306630631 is about 17510.8717944025. The cubic root of 306630631 is about 674.3290129670.

The spelling of 306630631 in words is "three hundred six million, six hundred thirty thousand, six hundred thirty-one".