28369279 has 8 divisors (see below), whose sum is σ = 29406960. Its totient is φ = 27335616.

The previous prime is 28369267. The next prime is 28369283. The reversal of 28369279 is 97296382.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28369279 is a prime.

It is a pancake number, because a pancake can be divided into 28369279 parts by 7532 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28369249) 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, 26947 + ... + 27979.

It is an arithmetic number, because the mean of its divisors is an integer number (3675870).

Almost surely, 2^28369279 is an apocalyptic number.

28369279 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28369279 is a deficient number, since it is larger than the sum of its proper divisors (1037681).

28369279 is a wasteful number, since it uses less digits than its factorization.

28369279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009.

The product of its digits is 326592, while the sum is 46.

The square root of 28369279 is about 5326.2819114275. The cubic root of 28369279 is about 304.9880099201.

The spelling of 28369279 in words is "twenty-eight million, three hundred sixty-nine thousand, two hundred seventy-nine".