28971455 has 8 divisors (see below), whose sum is σ = 34839504. Its totient is φ = 23128000.

The previous prime is 28971413. The next prime is 28971463. The reversal of 28971455 is 55417982.

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

It is not a de Polignac number, because 28971455 - 2⁸ = 28971199 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 3446 + ... + 8355.

It is an arithmetic number, because the mean of its divisors is an integer number (4354938).

Almost surely, 2^28971455 is an apocalyptic number.

28971455 is a deficient number, since it is larger than the sum of its proper divisors (5868049).

28971455 is a wasteful number, since it uses less digits than its factorization.

28971455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12297.

The product of its digits is 100800, while the sum is 41.

The square root of 28971455 is about 5382.5138179107. The cubic root of 28971455 is about 307.1308457020.

The spelling of 28971455 in words is "twenty-eight million, nine hundred seventy-one thousand, four hundred fifty-five".