28429487 has 2 divisors, whose sum is σ = 28429488. Its totient is φ = 28429486.

The previous prime is 28429469. The next prime is 28429543. The reversal of 28429487 is 78492482.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28429487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28429087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14214743 + 14214744.

It is an arithmetic number, because the mean of its divisors is an integer number (14214744).

Almost surely, 2^28429487 is an apocalyptic number.

28429487 is a deficient number, since it is larger than the sum of its proper divisors (1).

28429487 is an equidigital number, since it uses as much as digits as its factorization.

28429487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 44.

The square root of 28429487 is about 5331.9308885243. The cubic root of 28429487 is about 305.2036157171.

The spelling of 28429487 in words is "twenty-eight million, four hundred twenty-nine thousand, four hundred eighty-seven".