28743278 has 8 divisors (see below), whose sum is σ = 43928568. Its totient is φ = 14100424.

The previous prime is 28743269. The next prime is 28743289. The reversal of 28743278 is 87234782.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135476 + ... + 135687.

It is an arithmetic number, because the mean of its divisors is an integer number (5491071).

Almost surely, 2^28743278 is an apocalyptic number.

28743278 is a deficient number, since it is larger than the sum of its proper divisors (15185290).

28743278 is a wasteful number, since it uses less digits than its factorization.

28743278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271218.

The product of its digits is 150528, while the sum is 41.

The square root of 28743278 is about 5361.2757810059. The cubic root of 28743278 is about 306.3224064254.

The spelling of 28743278 in words is "twenty-eight million, seven hundred forty-three thousand, two hundred seventy-eight".