28980086 has 4 divisors (see below), whose sum is σ = 43470132. Its totient is φ = 14490042.

The previous prime is 28980067. The next prime is 28980089. The reversal of 28980086 is 68008982.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68008982 = 2 ⋅34004491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28980089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7245020 + ... + 7245023.

It is an arithmetic number, because the mean of its divisors is an integer number (10867533).

Almost surely, 2^28980086 is an apocalyptic number.

28980086 is a deficient number, since it is larger than the sum of its proper divisors (14490046).

28980086 is a wasteful number, since it uses less digits than its factorization.

28980086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14490045.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 28980086 is about 5383.3155211264. The cubic root of 28980086 is about 307.1613421927.

The spelling of 28980086 in words is "twenty-eight million, nine hundred eighty thousand, eighty-six".