28990747 has 2 divisors, whose sum is σ = 28990748. Its totient is φ = 28990746.

The previous prime is 28990739. The next prime is 28990757. The reversal of 28990747 is 74709982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28990747 - 2³ = 28990739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28990697 and 28990706.

It is not a weakly prime, because it can be changed into another prime (28990727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14495373 + 14495374.

It is an arithmetic number, because the mean of its divisors is an integer number (14495374).

Almost surely, 2^28990747 is an apocalyptic number.

28990747 is a deficient number, since it is larger than the sum of its proper divisors (1).

28990747 is an equidigital number, since it uses as much as digits as its factorization.

28990747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 28990747 is about 5384.3056191119. The cubic root of 28990747 is about 307.1990030610.

The spelling of 28990747 in words is "twenty-eight million, nine hundred ninety thousand, seven hundred forty-seven".