28870847 has 8 divisors (see below), whose sum is σ = 29855952. Its totient is φ = 27899200.

The previous prime is 28870837. The next prime is 28870859. The reversal of 28870847 is 74807882.

It is a happy number.

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-28870847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28870798 and 28870807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28870837) 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, 1097 + ... + 7677.

It is an arithmetic number, because the mean of its divisors is an integer number (3731994).

Almost surely, 2^28870847 is an apocalyptic number.

28870847 is a deficient number, since it is larger than the sum of its proper divisors (985105).

28870847 is a wasteful number, since it uses less digits than its factorization.

28870847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6729.

The product of its (nonzero) digits is 200704, while the sum is 44.

The square root of 28870847 is about 5373.1598710628. The cubic root of 28870847 is about 306.7749130840.

The spelling of 28870847 in words is "twenty-eight million, eight hundred seventy thousand, eight hundred forty-seven".