28299541 has 4 divisors (see below), whose sum is σ = 28389132. Its totient is φ = 28209952.

The previous prime is 28299539. The next prime is 28299599. The reversal of 28299541 is 14599282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7001316 + 21298225 = 2646^2 + 4615^2 .

It is a cyclic number.

It is not a de Polignac number, because 28299541 - 2¹ = 28299539 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28299494 and 28299503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28299511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44320 + ... + 44953.

It is an arithmetic number, because the mean of its divisors is an integer number (7097283).

Almost surely, 2^28299541 is an apocalyptic number.

It is an amenable number.

28299541 is a deficient number, since it is larger than the sum of its proper divisors (89591).

28299541 is an equidigital number, since it uses as much as digits as its factorization.

28299541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89590.

The product of its digits is 51840, while the sum is 40.

The square root of 28299541 is about 5319.7312902063. The cubic root of 28299541 is about 304.7378953994.

The spelling of 28299541 in words is "twenty-eight million, two hundred ninety-nine thousand, five hundred forty-one".