28723079 has 32 divisors (see below), whose sum is σ = 39052800. Its totient is φ = 20442240.

The previous prime is 28723073. The next prime is 28723109. The reversal of 28723079 is 97032782.

It is not a de Polignac number, because 28723079 - 2¹⁶ = 28657543 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 (28723073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42089 + ... + 42765.

It is an arithmetic number, because the mean of its divisors is an integer number (1220400).

Almost surely, 2^28723079 is an apocalyptic number.

28723079 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28723079 is a deficient number, since it is larger than the sum of its proper divisors (10329721).

28723079 is a wasteful number, since it uses less digits than its factorization.

28723079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 28723079 is about 5359.3916632394. The cubic root of 28723079 is about 306.2506347897.

The spelling of 28723079 in words is "twenty-eight million, seven hundred twenty-three thousand, seventy-nine".