28293743 has 2 divisors, whose sum is σ = 28293744. Its totient is φ = 28293742.

The previous prime is 28293737. The next prime is 28293757. The reversal of 28293743 is 34739282.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28293743 - 2¹² = 28289647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28293697 and 28293706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28293443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14146871 + 14146872.

It is an arithmetic number, because the mean of its divisors is an integer number (14146872).

Almost surely, 2^28293743 is an apocalyptic number.

28293743 is a deficient number, since it is larger than the sum of its proper divisors (1).

28293743 is an equidigital number, since it uses as much as digits as its factorization.

28293743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 28293743 is about 5319.1863099538. The cubic root of 28293743 is about 304.7170824470.

The spelling of 28293743 in words is "twenty-eight million, two hundred ninety-three thousand, seven hundred forty-three".