28700847 has 24 divisors (see below), whose sum is σ = 47849984. Its totient is φ = 16237584.

The previous prime is 28700843. The next prime is 28700851. The reversal of 28700847 is 74800782.

It is an interprime number because it is at equal distance from previous prime (28700843) and next prime (28700851).

It is not a de Polignac number, because 28700847 - 2² = 28700843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28700843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4278 + ... + 8700.

Almost surely, 2^28700847 is an apocalyptic number.

28700847 is a deficient number, since it is larger than the sum of its proper divisors (19149137).

28700847 is a wasteful number, since it uses less digits than its factorization.

28700847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539 (or 4536 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 28700847 is about 5357.3171457363. The cubic root of 28700847 is about 306.1716005341.

The spelling of 28700847 in words is "twenty-eight million, seven hundred thousand, eight hundred forty-seven".