28404743 has 2 divisors, whose sum is σ = 28404744. Its totient is φ = 28404742.

The previous prime is 28404731. The next prime is 28404749. The reversal of 28404743 is 34740482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28404743 - 2⁶ = 28404679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28404749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14202371 + 14202372.

It is an arithmetic number, because the mean of its divisors is an integer number (14202372).

Almost surely, 2^28404743 is an apocalyptic number.

28404743 is a deficient number, since it is larger than the sum of its proper divisors (1).

28404743 is an equidigital number, since it uses as much as digits as its factorization.

28404743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 28404743 is about 5329.6100232569. The cubic root of 28404743 is about 305.1150439429.

The spelling of 28404743 in words is "twenty-eight million, four hundred four thousand, seven hundred forty-three".