28947023 has 8 divisors (see below), whose sum is σ = 33129600. Its totient is φ = 24776280.

The previous prime is 28946999. The next prime is 28947029. The reversal of 28947023 is 32074982.

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

It is a cyclic number.

It is not a de Polignac number, because 28947023 - 2¹⁴ = 28930639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28947029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3128 + ... + 8226.

It is an arithmetic number, because the mean of its divisors is an integer number (4141200).

Almost surely, 2^28947023 is an apocalyptic number.

28947023 is a deficient number, since it is larger than the sum of its proper divisors (4182577).

28947023 is an equidigital number, since it uses as much as digits as its factorization.

28947023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5917.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 28947023 is about 5380.2437677116. The cubic root of 28947023 is about 307.0444856259.

The spelling of 28947023 in words is "twenty-eight million, nine hundred forty-seven thousand, twenty-three".