28983386 has 4 divisors (see below), whose sum is σ = 43475082. Its totient is φ = 14491692.

The previous prime is 28983373. The next prime is 28983391. The reversal of 28983386 is 68338982.

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: 68338982 = 2 ⋅34169491.

It can be written as a sum of positive squares in only one way, i.e., 27762361 + 1221025 = 5269^2 + 1105^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28983386.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7245845 + ... + 7245848.

Almost surely, 2^28983386 is an apocalyptic number.

28983386 is a deficient number, since it is larger than the sum of its proper divisors (14491696).

28983386 is a wasteful number, since it uses less digits than its factorization.

28983386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14491695.

The product of its digits is 497664, while the sum is 47.

The square root of 28983386 is about 5383.6220149635. The cubic root of 28983386 is about 307.1730007038.

The spelling of 28983386 in words is "twenty-eight million, nine hundred eighty-three thousand, three hundred eighty-six".