28928679 has 16 divisors (see below), whose sum is σ = 43983072. Its totient is φ = 16754688.

The previous prime is 28928677. The next prime is 28928681. The reversal of 28928679 is 97682982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28928677) and next prime (28928681).

It is not a de Polignac number, because 28928679 - 2¹ = 28928677 is a prime.

It is a super-3 number, since 3×28928679³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28928677) 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, 21154 + ... + 22479.

It is an arithmetic number, because the mean of its divisors is an integer number (2748942).

Almost surely, 2^28928679 is an apocalyptic number.

28928679 is a deficient number, since it is larger than the sum of its proper divisors (15054393).

28928679 is a wasteful number, since it uses less digits than its factorization.

28928679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43666.

The product of its digits is 870912, while the sum is 51.

The square root of 28928679 is about 5378.5387420748. The cubic root of 28928679 is about 306.9796129303.

The spelling of 28928679 in words is "twenty-eight million, nine hundred twenty-eight thousand, six hundred seventy-nine".