28027451 has 4 divisors (see below), whose sum is σ = 29502600. Its totient is φ = 26552304.

The previous prime is 28027411. The next prime is 28027453. The reversal of 28027451 is 15472082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28027451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28027453) 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, 737546 + ... + 737583.

It is an arithmetic number, because the mean of its divisors is an integer number (7375650).

Almost surely, 2^28027451 is an apocalyptic number.

28027451 is a deficient number, since it is larger than the sum of its proper divisors (1475149).

28027451 is a wasteful number, since it uses less digits than its factorization.

28027451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475148.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 28027451 is about 5294.0958623735. The cubic root of 28027451 is about 303.7580997801.

The spelling of 28027451 in words is "twenty-eight million, twenty-seven thousand, four hundred fifty-one".