28344471 has 8 divisors (see below), whose sum is σ = 38004480. Its totient is φ = 18790392.

The previous prime is 28344451. The next prime is 28344473. The reversal of 28344471 is 17444382.

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

It is not a de Polignac number, because 28344471 - 2⁷ = 28344343 is a prime.

It is a super-3 number, since 3×28344471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28344473) 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, 25855 + ... + 26928.

It is an arithmetic number, because the mean of its divisors is an integer number (4750560).

Almost surely, 2^28344471 is an apocalyptic number.

28344471 is a deficient number, since it is larger than the sum of its proper divisors (9660009).

28344471 is a wasteful number, since it uses less digits than its factorization.

28344471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52965.

The product of its digits is 21504, while the sum is 33.

The square root of 28344471 is about 5323.9525730420. The cubic root of 28344471 is about 304.8990833378.

The spelling of 28344471 in words is "twenty-eight million, three hundred forty-four thousand, four hundred seventy-one".