28976743 has 4 divisors (see below), whose sum is σ = 29523528. Its totient is φ = 28429960.

The previous prime is 28976741. The next prime is 28976747. The reversal of 28976743 is 34767982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34767982 = 2 ⋅17383991.

It is a cyclic number.

It is not a de Polignac number, because 28976743 - 2¹ = 28976741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28976693 and 28976702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28976741) 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, 273313 + ... + 273418.

It is an arithmetic number, because the mean of its divisors is an integer number (7380882).

Almost surely, 2^28976743 is an apocalyptic number.

28976743 is a deficient number, since it is larger than the sum of its proper divisors (546785).

28976743 is an equidigital number, since it uses as much as digits as its factorization.

28976743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546784.

The product of its digits is 508032, while the sum is 46.

The square root of 28976743 is about 5383.0050157881. The cubic root of 28976743 is about 307.1495308653.

The spelling of 28976743 in words is "twenty-eight million, nine hundred seventy-six thousand, seven hundred forty-three".