28047451 has 2 divisors, whose sum is σ = 28047452. Its totient is φ = 28047450.

The previous prime is 28047431. The next prime is 28047463. The reversal of 28047451 is 15474082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28047451 - 2¹¹ = 28045403 is a prime.

It is not a weakly prime, because it can be changed into another prime (28047421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14023725 + 14023726.

It is an arithmetic number, because the mean of its divisors is an integer number (14023726).

Almost surely, 2^28047451 is an apocalyptic number.

28047451 is a deficient number, since it is larger than the sum of its proper divisors (1).

28047451 is an equidigital number, since it uses as much as digits as its factorization.

28047451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 28047451 is about 5295.9844221825. The cubic root of 28047451 is about 303.8303351220.

The spelling of 28047451 in words is "twenty-eight million, forty-seven thousand, four hundred fifty-one".