28709630 has 16 divisors (see below), whose sum is σ = 52022304. Its totient is φ = 11407200.

The previous prime is 28709591. The next prime is 28709633. The reversal of 28709630 is 3690782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28709633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7997 + ... + 11016.

It is an arithmetic number, because the mean of its divisors is an integer number (3251394).

Almost surely, 2^28709630 is an apocalyptic number.

28709630 is a deficient number, since it is larger than the sum of its proper divisors (23312674).

28709630 is a wasteful number, since it uses less digits than its factorization.

28709630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19171.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 28709630 is about 5358.1368030314. The cubic root of 28709630 is about 306.2028287752.

The spelling of 28709630 in words is "twenty-eight million, seven hundred nine thousand, six hundred thirty".