28047302 has 8 divisors (see below), whose sum is σ = 42784200. Its totient is φ = 13785904.

The previous prime is 28047301. The next prime is 28047307. The reversal of 28047302 is 20374082.

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

It is a super-2 number, since 2×28047302² = 1573302298958408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28047301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118727 + ... + 118962.

It is an arithmetic number, because the mean of its divisors is an integer number (5348025).

Almost surely, 2^28047302 is an apocalyptic number.

28047302 is a deficient number, since it is larger than the sum of its proper divisors (14736898).

28047302 is a wasteful number, since it uses less digits than its factorization.

28047302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237750.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 28047302 is about 5295.9703549019. The cubic root of 28047302 is about 303.8297970957.

The spelling of 28047302 in words is "twenty-eight million, forty-seven thousand, three hundred two".