28949713 has 8 divisors (see below), whose sum is σ = 31765608. Its totient is φ = 26217984.

The previous prime is 28949699. The next prime is 28949717. The reversal of 28949713 is 31794982.

It can be written as a sum of positive squares in 4 ways, for example, as 305809 + 28643904 = 553^2 + 5352^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28949713 - 2⁵ = 28949681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28949713.

It is not an unprimeable number, because it can be changed into a prime (28949717) 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, 20320 + ... + 21697.

It is an arithmetic number, because the mean of its divisors is an integer number (3970701).

Almost surely, 2^28949713 is an apocalyptic number.

It is an amenable number.

28949713 is a deficient number, since it is larger than the sum of its proper divisors (2815895).

28949713 is a wasteful number, since it uses less digits than its factorization.

28949713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42083.

The product of its digits is 108864, while the sum is 43.

The square root of 28949713 is about 5380.4937505772. The cubic root of 28949713 is about 307.0539963804.

The spelling of 28949713 in words is "twenty-eight million, nine hundred forty-nine thousand, seven hundred thirteen".