28126345 has 8 divisors (see below), whose sum is σ = 36347976. Its totient is φ = 20770176.

The previous prime is 28126339. The next prime is 28126349. The reversal of 28126345 is 54362182.

It can be written as a sum of positive squares in 4 ways, for example, as 710649 + 27415696 = 843^2 + 5236^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28126345 - 2²³ = 19737737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28126349) 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, 216292 + ... + 216421.

It is an arithmetic number, because the mean of its divisors is an integer number (4543497).

Almost surely, 2^28126345 is an apocalyptic number.

It is an amenable number.

28126345 is a deficient number, since it is larger than the sum of its proper divisors (8221631).

28126345 is a wasteful number, since it uses less digits than its factorization.

28126345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432731.

The product of its digits is 11520, while the sum is 31.

The square root of 28126345 is about 5303.4276651992. The cubic root of 28126345 is about 304.1149474417.

The spelling of 28126345 in words is "twenty-eight million, one hundred twenty-six thousand, three hundred forty-five".