28546993 has 2 divisors, whose sum is σ = 28546994. Its totient is φ = 28546992.

The previous prime is 28546981. The next prime is 28546997. The reversal of 28546993 is 39964582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21455424 + 7091569 = 4632^2 + 2663^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28546993 is a prime.

It is not a weakly prime, because it can be changed into another prime (28546997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14273496 + 14273497.

It is an arithmetic number, because the mean of its divisors is an integer number (14273497).

Almost surely, 2^28546993 is an apocalyptic number.

It is an amenable number.

28546993 is a deficient number, since it is larger than the sum of its proper divisors (1).

28546993 is an equidigital number, since it uses as much as digits as its factorization.

28546993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 46.

The square root of 28546993 is about 5342.9386109144. The cubic root of 28546993 is about 305.6235313571.

It can be divided in two parts, 285 and 46993, that added together give a triangular number (47278 = T₃₀₇).

The spelling of 28546993 in words is "twenty-eight million, five hundred forty-six thousand, nine hundred ninety-three".