28306630 has 32 divisors (see below), whose sum is σ = 55844640. Its totient is φ = 10245120.

The previous prime is 28306609. The next prime is 28306633. The reversal of 28306630 is 3660382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28306633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30006 + ... + 30934.

It is an arithmetic number, because the mean of its divisors is an integer number (1745145).

Almost surely, 2^28306630 is an apocalyptic number.

28306630 is a deficient number, since it is larger than the sum of its proper divisors (27538010).

28306630 is a wasteful number, since it uses less digits than its factorization.

28306630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 28306630 is about 5320.3975415377. The cubic root of 28306630 is about 304.7633387636.

The spelling of 28306630 in words is "twenty-eight million, three hundred six thousand, six hundred thirty".