307628 has 6 divisors (see below), whose sum is σ = 538356. Its totient is φ = 153812.

The previous prime is 307627. The next prime is 307631. The reversal of 307628 is 826703.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 307597 and 307606.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 307628.

It is not an unprimeable number, because it can be changed into a prime (307627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38450 + ... + 38457.

It is an arithmetic number, because the mean of its divisors is an integer number (89726).

2³⁰⁷⁶²⁸ is an apocalyptic number.

It is an amenable number.

307628 is a deficient number, since it is larger than the sum of its proper divisors (230728).

307628 is a wasteful number, since it uses less digits than its factorization.

307628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76911 (or 76909 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 307628 is about 554.6422270257. The cubic root of 307628 is about 67.5059345491.

The spelling of 307628 in words is "three hundred seven thousand, six hundred twenty-eight".