28078741 has 2 divisors, whose sum is σ = 28078742. Its totient is φ = 28078740.

The previous prime is 28078717. The next prime is 28078759. The reversal of 28078741 is 14787082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15046641 + 13032100 = 3879^2 + 3610^2 .

It is a cyclic number.

It is not a de Polignac number, because 28078741 - 2⁵ = 28078709 is a prime.

It is a super-2 number, since 2×28078741² = 1576831392290162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28078741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28078541) 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, 14039370 + 14039371.

It is an arithmetic number, because the mean of its divisors is an integer number (14039371).

Almost surely, 2^28078741 is an apocalyptic number.

It is an amenable number.

28078741 is a deficient number, since it is larger than the sum of its proper divisors (1).

28078741 is an equidigital number, since it uses as much as digits as its factorization.

28078741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 28078741 is about 5298.9377237329. The cubic root of 28078741 is about 303.9432784582.

The spelling of 28078741 in words is "twenty-eight million, seventy-eight thousand, seven hundred forty-one".