28847138 has 8 divisors (see below), whose sum is σ = 43379820. Its totient is φ = 14387200.

The previous prime is 28847123. The next prime is 28847153. The reversal of 28847138 is 83174882.

It is an interprime number because it is at equal distance from previous prime (28847123) and next prime (28847153).

It can be written as a sum of positive squares in 2 ways, for example, as 19562929 + 9284209 = 4423^2 + 3047^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28847095 and 28847104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17183 + ... + 18786.

Almost surely, 2^28847138 is an apocalyptic number.

28847138 is a deficient number, since it is larger than the sum of its proper divisors (14532682).

28847138 is a wasteful number, since it uses less digits than its factorization.

28847138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36372.

The product of its digits is 86016, while the sum is 41.

The square root of 28847138 is about 5370.9531742513. The cubic root of 28847138 is about 306.6909146443.

The spelling of 28847138 in words is "twenty-eight million, eight hundred forty-seven thousand, one hundred thirty-eight".