28841530 has 8 divisors (see below), whose sum is σ = 51914772. Its totient is φ = 11536608.

The previous prime is 28841513. The next prime is 28841531. The reversal of 28841530 is 3514882.

It can be written as a sum of positive squares in 2 ways, for example, as 28079401 + 762129 = 5299^2 + 873^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28841492 and 28841501.

It is not an unprimeable number, because it can be changed into a prime (28841531) 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, 1442067 + ... + 1442086.

Almost surely, 2^28841530 is an apocalyptic number.

28841530 is a deficient number, since it is larger than the sum of its proper divisors (23073242).

28841530 is a wasteful number, since it uses less digits than its factorization.

28841530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884160.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28841530 is about 5370.4310813937. The cubic root of 28841530 is about 306.6710393726.

The spelling of 28841530 in words is "twenty-eight million, eight hundred forty-one thousand, five hundred thirty".