28741947 has 8 divisors (see below), whose sum is σ = 41270544. Its totient is φ = 17687328.

The previous prime is 28741913. The next prime is 28741981. The reversal of 28741947 is 74914782.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28741913) and next prime (28741981).

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

It is not a de Polignac number, because 28741947 - 2⁷ = 28741819 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28741899 and 28741908.

It is not an unprimeable number, because it can be changed into a prime (28743947) 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, 368448 + ... + 368525.

It is an arithmetic number, because the mean of its divisors is an integer number (5158818).

Almost surely, 2^28741947 is an apocalyptic number.

28741947 is a deficient number, since it is larger than the sum of its proper divisors (12528597).

28741947 is a wasteful number, since it uses less digits than its factorization.

28741947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736989.

The product of its digits is 112896, while the sum is 42.

The square root of 28741947 is about 5361.1516486665. The cubic root of 28741947 is about 306.3176781151.

The spelling of 28741947 in words is "twenty-eight million, seven hundred forty-one thousand, nine hundred forty-seven".