28897349 has 8 divisors (see below), whose sum is σ = 31708152. Its totient is φ = 26170560.

The previous prime is 28897343. The next prime is 28897357. The reversal of 28897349 is 94379882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6724 + 28890625 = 82^2 + 5375^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-28897349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28897297 and 28897306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28897343) 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, 20282 + ... + 21659.

It is an arithmetic number, because the mean of its divisors is an integer number (3963519).

Almost surely, 2^28897349 is an apocalyptic number.

It is an amenable number.

28897349 is a deficient number, since it is larger than the sum of its proper divisors (2810803).

28897349 is a wasteful number, since it uses less digits than its factorization.

28897349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42007.

The product of its digits is 870912, while the sum is 50.

The square root of 28897349 is about 5375.6254519823. The cubic root of 28897349 is about 306.8687524083.

The spelling of 28897349 in words is "twenty-eight million, eight hundred ninety-seven thousand, three hundred forty-nine".