28880247 has 16 divisors (see below), whose sum is σ = 44219520. Its totient is φ = 16581600.

The previous prime is 28880237. The next prime is 28880261. The reversal of 28880247 is 74208882.

It is not a de Polignac number, because 28880247 - 2⁶ = 28880183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28880227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22404 + ... + 23657.

It is an arithmetic number, because the mean of its divisors is an integer number (2763720).

Almost surely, 2^28880247 is an apocalyptic number.

28880247 is a deficient number, since it is larger than the sum of its proper divisors (15339273).

28880247 is a wasteful number, since it uses less digits than its factorization.

28880247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46094.

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 28880247 is about 5374.0345179390. The cubic root of 28880247 is about 306.8082035433.

The spelling of 28880247 in words is "twenty-eight million, eight hundred eighty thousand, two hundred forty-seven".