28951489 has 8 divisors (see below), whose sum is σ = 34155008. Its totient is φ = 24014880.

The previous prime is 28951471. The next prime is 28951519. The reversal of 28951489 is 98415982.

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 28951489 - 2⁷ = 28951361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28951469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66492 + ... + 66925.

It is an arithmetic number, because the mean of its divisors is an integer number (4269376).

Almost surely, 2^28951489 is an apocalyptic number.

It is an amenable number.

28951489 is a deficient number, since it is larger than the sum of its proper divisors (5203519).

28951489 is a wasteful number, since it uses less digits than its factorization.

28951489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133455.

The product of its digits is 207360, while the sum is 46.

The square root of 28951489 is about 5380.6587886615. The cubic root of 28951489 is about 307.0602752768.

The spelling of 28951489 in words is "twenty-eight million, nine hundred fifty-one thousand, four hundred eighty-nine".