28119937 has 8 divisors (see below), whose sum is σ = 29350440. Its totient is φ = 26906880.

The previous prime is 28119913. The next prime is 28119947. The reversal of 28119937 is 73991182.

It can be written as a sum of positive squares in 4 ways, for example, as 2556801 + 25563136 = 1599^2 + 5056^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28119937 - 2¹⁹ = 27595649 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 28119937.

It is not an unprimeable number, because it can be changed into a prime (28119947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1014 + ... + 7567.

It is an arithmetic number, because the mean of its divisors is an integer number (3668805).

Almost surely, 2^28119937 is an apocalyptic number.

It is an amenable number.

28119937 is a deficient number, since it is larger than the sum of its proper divisors (1230503).

28119937 is a wasteful number, since it uses less digits than its factorization.

28119937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8723.

The product of its digits is 27216, while the sum is 40.

The square root of 28119937 is about 5302.8234931968. The cubic root of 28119937 is about 304.0918502754.

The spelling of 28119937 in words is "twenty-eight million, one hundred nineteen thousand, nine hundred thirty-seven".