28373743 has 4 divisors (see below), whose sum is σ = 29607408. Its totient is φ = 27140080.

The previous prime is 28373729. The next prime is 28373753. The reversal of 28373743 is 34737382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34737382 = 2 ⋅17368691.

It is a cyclic number.

It is not a de Polignac number, because 28373743 - 2¹³ = 28365551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28373753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616798 + ... + 616843.

It is an arithmetic number, because the mean of its divisors is an integer number (7401852).

Almost surely, 2^28373743 is an apocalyptic number.

28373743 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28373743 is a deficient number, since it is larger than the sum of its proper divisors (1233665).

28373743 is a wasteful number, since it uses less digits than its factorization.

28373743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233664.

The product of its digits is 84672, while the sum is 37.

The square root of 28373743 is about 5326.7009489927. The cubic root of 28373743 is about 305.0040060389.

The spelling of 28373743 in words is "twenty-eight million, three hundred seventy-three thousand, seven hundred forty-three".