306828623 has 4 divisors (see below), whose sum is σ = 306964728. Its totient is φ = 306692520.

The previous prime is 306828619. The next prime is 306828637. The reversal of 306828623 is 326828603.

It is a happy number.

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 306828623 - 2² = 306828619 is a prime.

It is a super-2 number, since 2×306828623² = 188287607784152258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306828523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64613 + ... + 69198.

It is an arithmetic number, because the mean of its divisors is an integer number (76741182).

Almost surely, 2^306828623 is an apocalyptic number.

306828623 is a deficient number, since it is larger than the sum of its proper divisors (136105).

306828623 is a wasteful number, since it uses less digits than its factorization.

306828623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136104.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 306828623 is about 17516.5242842294. The cubic root of 306828623 is about 674.4741202617.

The spelling of 306828623 in words is "three hundred six million, eight hundred twenty-eight thousand, six hundred twenty-three".