28986436 has 6 divisors (see below), whose sum is σ = 50726270. Its totient is φ = 14493216.

The previous prime is 28986427. The next prime is 28986449. The reversal of 28986436 is 63468982.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24601600 + 4384836 = 4960^2 + 2094^2 .

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, 3623301 + ... + 3623308.

Almost surely, 2^28986436 is an apocalyptic number.

It is an amenable number.

28986436 is a deficient number, since it is larger than the sum of its proper divisors (21739834).

28986436 is a wasteful number, since it uses less digits than its factorization.

28986436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7246613 (or 7246611 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The square root of 28986436 is about 5383.9052740553. The cubic root of 28986436 is about 307.1837752074.

It can be divided in two parts, 289 and 86436, that multiplied together give a square (24980004 = 4998²).

The spelling of 28986436 in words is "twenty-eight million, nine hundred eighty-six thousand, four hundred thirty-six".