28885898 has 4 divisors (see below), whose sum is σ = 43328850. Its totient is φ = 14442948.

The previous prime is 28885897. The next prime is 28885919. The reversal of 28885898 is 89858882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89858882 = 2 ⋅44929441.

It can be written as a sum of positive squares in only one way, i.e., 24671089 + 4214809 = 4967^2 + 2053^2 .

It is not an unprimeable number, because it can be changed into a prime (28885897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7221473 + ... + 7221476.

Almost surely, 2^28885898 is an apocalyptic number.

28885898 is a deficient number, since it is larger than the sum of its proper divisors (14442952).

28885898 is a wasteful number, since it uses less digits than its factorization.

28885898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14442951.

The product of its digits is 2949120, while the sum is 56.

The square root of 28885898 is about 5374.5602610818. The cubic root of 28885898 is about 306.8282132993.

The spelling of 28885898 in words is "twenty-eight million, eight hundred eighty-five thousand, eight hundred ninety-eight".