28801547 has 2 divisors, whose sum is σ = 28801548. Its totient is φ = 28801546.

The previous prime is 28801541. The next prime is 28801603. The reversal of 28801547 is 74510882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28801547 - 2⁶ = 28801483 is a prime.

It is not a weakly prime, because it can be changed into another prime (28801541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14400773 + 14400774.

It is an arithmetic number, because the mean of its divisors is an integer number (14400774).

Almost surely, 2^28801547 is an apocalyptic number.

28801547 is a deficient number, since it is larger than the sum of its proper divisors (1).

28801547 is an equidigital number, since it uses as much as digits as its factorization.

28801547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 28801547 is about 5366.7072772791. The cubic root of 28801547 is about 306.5292611957.

The spelling of 28801547 in words is "twenty-eight million, eight hundred one thousand, five hundred forty-seven".