28062889 has 4 divisors (see below), whose sum is σ = 28169856. Its totient is φ = 27955924.

The previous prime is 28062851. The next prime is 28062899. The reversal of 28062889 is 98826082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98826082 = 2 ⋅49413041.

It is a cyclic number.

It is not a de Polignac number, because 28062889 - 2¹¹ = 28060841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28062899) 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, 53089 + ... + 53614.

It is an arithmetic number, because the mean of its divisors is an integer number (7042464).

Almost surely, 2^28062889 is an apocalyptic number.

It is an amenable number.

28062889 is a deficient number, since it is larger than the sum of its proper divisors (106967).

28062889 is a wasteful number, since it uses less digits than its factorization.

28062889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106966.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 28062889 is about 5297.4417410671. The cubic root of 28062889 is about 303.8860701022.

The spelling of 28062889 in words is "twenty-eight million, sixty-two thousand, eight hundred eighty-nine".