28045274 has 8 divisors (see below), whose sum is σ = 44542548. Its totient is φ = 13197760.

The previous prime is 28045267. The next prime is 28045279. The reversal of 28045274 is 47254082.

It can be written as a sum of positive squares in 2 ways, for example, as 24930049 + 3115225 = 4993^2 + 1765^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28045274.

It is not an unprimeable number, because it can be changed into a prime (28045279) 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, 412397 + ... + 412464.

Almost surely, 2^28045274 is an apocalyptic number.

28045274 is a deficient number, since it is larger than the sum of its proper divisors (16497274).

28045274 is a wasteful number, since it uses less digits than its factorization.

28045274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824880.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 28045274 is about 5295.7788851122. The cubic root of 28045274 is about 303.8224739708.

It can be divided in two parts, 280 and 45274, that added together give a palindrome (45554).

The spelling of 28045274 in words is "twenty-eight million, forty-five thousand, two hundred seventy-four".