28986830 has 8 divisors (see below), whose sum is σ = 52176312. Its totient is φ = 11594728.

The previous prime is 28986821. The next prime is 28986847. The reversal of 28986830 is 3868982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×28986830³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1449332 + ... + 1449351.

It is an arithmetic number, because the mean of its divisors is an integer number (6522039).

Almost surely, 2^28986830 is an apocalyptic number.

28986830 is a deficient number, since it is larger than the sum of its proper divisors (23189482).

28986830 is a wasteful number, since it uses less digits than its factorization.

28986830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898690.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 28986830 is about 5383.9418644707. The cubic root of 28986830 is about 307.1851670062.

The spelling of 28986830 in words is "twenty-eight million, nine hundred eighty-six thousand, eight hundred thirty".