28679501 has 4 divisors (see below), whose sum is σ = 28702752. Its totient is φ = 28656252.

The previous prime is 28679491. The next prime is 28679507. The reversal of 28679501 is 10597682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10597682 = 2 ⋅5298841.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28679501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28679507) 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, 9665 + ... + 12278.

It is an arithmetic number, because the mean of its divisors is an integer number (7175688).

Almost surely, 2^28679501 is an apocalyptic number.

It is an amenable number.

28679501 is a deficient number, since it is larger than the sum of its proper divisors (23251).

28679501 is a wasteful number, since it uses less digits than its factorization.

28679501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23250.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 28679501 is about 5355.3245466545. The cubic root of 28679501 is about 306.0956775726.

The spelling of 28679501 in words is "twenty-eight million, six hundred seventy-nine thousand, five hundred one".