28742847 has 16 divisors (see below), whose sum is σ = 45703680. Its totient is φ = 15710112.

The previous prime is 28742843. The next prime is 28742851. The reversal of 28742847 is 74824782.

It is an interprime number because it is at equal distance from previous prime (28742843) and next prime (28742851).

It is not a de Polignac number, because 28742847 - 2² = 28742843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28742799 and 28742808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28742843) 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, 29272 + ... + 30237.

It is an arithmetic number, because the mean of its divisors is an integer number (2856480).

Almost surely, 2^28742847 is an apocalyptic number.

28742847 is a deficient number, since it is larger than the sum of its proper divisors (16960833).

28742847 is a wasteful number, since it uses less digits than its factorization.

28742847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59542.

The product of its digits is 200704, while the sum is 42.

The square root of 28742847 is about 5361.2355851986. The cubic root of 28742847 is about 306.3208753356.

It can be divided in two parts, 287 and 42847, that added together give a palindrome (43134).

The spelling of 28742847 in words is "twenty-eight million, seven hundred forty-two thousand, eight hundred forty-seven".