28707343 has 4 divisors (see below), whose sum is σ = 32808400. Its totient is φ = 24606288.

The previous prime is 28707337. The next prime is 28707353. The reversal of 28707343 is 34370782.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28707343 - 2¹⁷ = 28576271 is a prime.

It is a super-2 number, since 2×28707343² = 1648223084239298, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28707299 and 28707308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28707313) 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, 2050518 + ... + 2050531.

It is an arithmetic number, because the mean of its divisors is an integer number (8202100).

Almost surely, 2^28707343 is an apocalyptic number.

28707343 is a deficient number, since it is larger than the sum of its proper divisors (4101057).

28707343 is an equidigital number, since it uses as much as digits as its factorization.

28707343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101056.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 28707343 is about 5357.9233850439. The cubic root of 28707343 is about 306.1946978860.

The spelling of 28707343 in words is "twenty-eight million, seven hundred seven thousand, three hundred forty-three".