28971470 has 32 divisors (see below), whose sum is σ = 57753216. Its totient is φ = 10375200.

The previous prime is 28971469. The next prime is 28971487. The reversal of 28971470 is 7417982.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5405 + ... + 9335.

It is an arithmetic number, because the mean of its divisors is an integer number (1804788).

Almost surely, 2^28971470 is an apocalyptic number.

28971470 is a deficient number, since it is larger than the sum of its proper divisors (28781746).

28971470 is a wasteful number, since it uses less digits than its factorization.

28971470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 28971470 is about 5382.5152113115. The cubic root of 28971470 is about 307.1308987077.

The spelling of 28971470 in words is "twenty-eight million, nine hundred seventy-one thousand, four hundred seventy".