306632638 has 16 divisors (see below), whose sum is σ = 524467440. Its totient is φ = 133197696.

The previous prime is 306632633. The next prime is 306632647. The reversal of 306632638 is 836236603.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 306632597 and 306632606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306632633) 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, 346428 + ... + 347311.

It is an arithmetic number, because the mean of its divisors is an integer number (32779215).

Almost surely, 2^306632638 is an apocalyptic number.

306632638 is a deficient number, since it is larger than the sum of its proper divisors (217834802).

306632638 is a wasteful number, since it uses less digits than its factorization.

306632638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693771.

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 306632638 is about 17510.9291015640. The cubic root of 306632638 is about 674.3304842001.

The spelling of 306632638 in words is "three hundred six million, six hundred thirty-two thousand, six hundred thirty-eight".