28500043 has 16 divisors (see below), whose sum is σ = 34306272. Its totient is φ = 23328000.

The previous prime is 28500029. The next prime is 28500047. The reversal of 28500043 is 34000582.

It is a cyclic number.

It is not a de Polignac number, because 28500043 - 2¹³ = 28491851 is a prime.

It is a super-4 number, since 4×28500043⁴ (a number of 31 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28499987 and 28500023.

It is not an unprimeable number, because it can be changed into a prime (28500047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3433 + ... + 8293.

It is an arithmetic number, because the mean of its divisors is an integer number (2144142).

Almost surely, 2^28500043 is an apocalyptic number.

28500043 is a deficient number, since it is larger than the sum of its proper divisors (5806229).

28500043 is a wasteful number, since it uses less digits than its factorization.

28500043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 28500043 is about 5338.5431533331. The cubic root of 28500043 is about 305.4558908354.

The spelling of 28500043 in words is "twenty-eight million, five hundred thousand, forty-three".