28649783 has 2 divisors, whose sum is σ = 28649784. Its totient is φ = 28649782.

The previous prime is 28649779. The next prime is 28649813. The reversal of 28649783 is 38794682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28649783 - 2² = 28649779 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28649713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14324891 + 14324892.

It is an arithmetic number, because the mean of its divisors is an integer number (14324892).

Almost surely, 2^28649783 is an apocalyptic number.

28649783 is a deficient number, since it is larger than the sum of its proper divisors (1).

28649783 is an equidigital number, since it uses as much as digits as its factorization.

28649783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 28649783 is about 5352.5492057523. The cubic root of 28649783 is about 305.9899145152.

The spelling of 28649783 in words is "twenty-eight million, six hundred forty-nine thousand, seven hundred eighty-three".