28986730 has 16 divisors (see below), whose sum is σ = 53390304. Its totient is φ = 11324880.

The previous prime is 28986721. The next prime is 28986743. The reversal of 28986730 is 3768982.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33276 + ... + 34135.

It is an arithmetic number, because the mean of its divisors is an integer number (3336894).

Almost surely, 2^28986730 is an apocalyptic number.

28986730 is a deficient number, since it is larger than the sum of its proper divisors (24403574).

28986730 is a wasteful number, since it uses less digits than its factorization.

28986730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67461.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28986730 is about 5383.9325775868. The cubic root of 28986730 is about 307.1848137589.

The spelling of 28986730 in words is "twenty-eight million, nine hundred eighty-six thousand, seven hundred thirty".