28980986 has 4 divisors (see below), whose sum is σ = 43471482. Its totient is φ = 14490492.

The previous prime is 28980949. The next prime is 28981021. The reversal of 28980986 is 68908982.

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

It can be written as a sum of positive squares in only one way, i.e., 27888961 + 1092025 = 5281^2 + 1045^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7245245 + ... + 7245248.

Almost surely, 2^28980986 is an apocalyptic number.

28980986 is a deficient number, since it is larger than the sum of its proper divisors (14490496).

28980986 is a wasteful number, since it uses less digits than its factorization.

28980986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14490495.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 28980986 is about 5383.3991120852. The cubic root of 28980986 is about 307.1645218744.

The spelling of 28980986 in words is "twenty-eight million, nine hundred eighty thousand, nine hundred eighty-six".