28246945 has 8 divisors (see below), whose sum is σ = 35890344. Its totient is φ = 21268224.

The previous prime is 28246937. The next prime is 28246951. The reversal of 28246945 is 54964282.

It can be written as a sum of positive squares in 4 ways, for example, as 4129024 + 24117921 = 2032^2 + 4911^2 .

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

It is not a de Polignac number, because 28246945 - 2³ = 28246937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28246898 and 28246907.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166074 + ... + 166243.

It is an arithmetic number, because the mean of its divisors is an integer number (4486293).

Almost surely, 2^28246945 is an apocalyptic number.

It is an amenable number.

28246945 is a deficient number, since it is larger than the sum of its proper divisors (7643399).

28246945 is a wasteful number, since it uses less digits than its factorization.

28246945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332339.

The product of its digits is 138240, while the sum is 40.

The square root of 28246945 is about 5314.7855083719. The cubic root of 28246945 is about 304.5489885169.

The spelling of 28246945 in words is "twenty-eight million, two hundred forty-six thousand, nine hundred forty-five".