28403741 has 2 divisors, whose sum is σ = 28403742. Its totient is φ = 28403740.

The previous prime is 28403729. The next prime is 28403743. The reversal of 28403741 is 14730482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27258841 + 1144900 = 5221^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 28403741 - 2¹⁴ = 28387357 is a prime.

It is a Sophie Germain prime.

Together with 28403743, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28403743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14201870 + 14201871.

It is an arithmetic number, because the mean of its divisors is an integer number (14201871).

Almost surely, 2^28403741 is an apocalyptic number.

It is an amenable number.

28403741 is a deficient number, since it is larger than the sum of its proper divisors (1).

28403741 is an equidigital number, since it uses as much as digits as its factorization.

28403741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 28403741 is about 5329.5160193023. The cubic root of 28403741 is about 305.1114561750. Note that the first 3 decimals are identical.

The spelling of 28403741 in words is "twenty-eight million, four hundred three thousand, seven hundred forty-one".