28951285 has 8 divisors (see below), whose sum is σ = 37899936. Its totient is φ = 21055440.

The previous prime is 28951277. The next prime is 28951291. The reversal of 28951285 is 58215982.

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

It is not a de Polignac number, because 28951285 - 2³ = 28951277 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, 263139 + ... + 263248.

It is an arithmetic number, because the mean of its divisors is an integer number (4737492).

Almost surely, 2^28951285 is an apocalyptic number.

It is an amenable number.

28951285 is a deficient number, since it is larger than the sum of its proper divisors (8948651).

28951285 is a wasteful number, since it uses less digits than its factorization.

28951285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526403.

The product of its digits is 57600, while the sum is 40.

The square root of 28951285 is about 5380.6398318416. The cubic root of 28951285 is about 307.0595540653.

The spelling of 28951285 in words is "twenty-eight million, nine hundred fifty-one thousand, two hundred eighty-five".