28401847 has 2 divisors, whose sum is σ = 28401848. Its totient is φ = 28401846.

The previous prime is 28401839. The next prime is 28401851. The reversal of 28401847 is 74810482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28401847 - 2³ = 28401839 is a prime.

It is a super-2 number, since 2×28401847² = 1613329826022818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28401547) 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, 14200923 + 14200924.

It is an arithmetic number, because the mean of its divisors is an integer number (14200924).

Almost surely, 2^28401847 is an apocalyptic number.

28401847 is a deficient number, since it is larger than the sum of its proper divisors (1).

28401847 is an equidigital number, since it uses as much as digits as its factorization.

28401847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 28401847 is about 5329.3383266593. The cubic root of 28401847 is about 305.1046742756.

The spelling of 28401847 in words is "twenty-eight million, four hundred one thousand, eight hundred forty-seven".