28254405 has 8 divisors (see below), whose sum is σ = 45207072. Its totient is φ = 15069008.

The previous prime is 28254403. The next prime is 28254449. The reversal of 28254405 is 50445282.

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 28254405 - 2¹ = 28254403 is a prime.

It is a super-2 number, since 2×28254405² = 1596622803808050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28254403) 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, 941799 + ... + 941828.

It is an arithmetic number, because the mean of its divisors is an integer number (5650884).

Almost surely, 2^28254405 is an apocalyptic number.

It is an amenable number.

28254405 is a deficient number, since it is larger than the sum of its proper divisors (16952667).

28254405 is a wasteful number, since it uses less digits than its factorization.

28254405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883635.

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 28254405 is about 5315.4872777573. The cubic root of 28254405 is about 304.5757965543.

Adding to 28254405 its reverse (50445282), we get a palindrome (78699687).

The spelling of 28254405 in words is "twenty-eight million, two hundred fifty-four thousand, four hundred five".