28951279 has 8 divisors (see below), whose sum is σ = 33981728. Its totient is φ = 24144480.

The previous prime is 28951277. The next prime is 28951291. The reversal of 28951279 is 97215982.

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 28951279 - 2¹ = 28951277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28951277) 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, 55632 + ... + 56149.

It is an arithmetic number, because the mean of its divisors is an integer number (4247716).

Almost surely, 2^28951279 is an apocalyptic number.

28951279 is a deficient number, since it is larger than the sum of its proper divisors (5030449).

28951279 is a wasteful number, since it uses less digits than its factorization.

28951279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111825.

The product of its digits is 90720, while the sum is 43.

The square root of 28951279 is about 5380.6392742870. The cubic root of 28951279 is about 307.0595328531.

The spelling of 28951279 in words is "twenty-eight million, nine hundred fifty-one thousand, two hundred seventy-nine".