28474387 has 2 divisors, whose sum is σ = 28474388. Its totient is φ = 28474386.

The previous prime is 28474367. The next prime is 28474421. The reversal of 28474387 is 78347482.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28474387 is a prime.

It is not a weakly prime, because it can be changed into another prime (28474357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14237193 + 14237194.

It is an arithmetic number, because the mean of its divisors is an integer number (14237194).

Almost surely, 2^28474387 is an apocalyptic number.

28474387 is a deficient number, since it is larger than the sum of its proper divisors (1).

28474387 is an equidigital number, since it uses as much as digits as its factorization.

28474387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 301056, while the sum is 43.

The square root of 28474387 is about 5336.1397095653. The cubic root of 28474387 is about 305.3642052534.

The spelling of 28474387 in words is "twenty-eight million, four hundred seventy-four thousand, three hundred eighty-seven".