28087390 has 8 divisors (see below), whose sum is σ = 50557320. Its totient is φ = 11234952.

The previous prime is 28087373. The next prime is 28087429. The reversal of 28087390 is 9378082.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1404360 + ... + 1404379.

It is an arithmetic number, because the mean of its divisors is an integer number (6319665).

Almost surely, 2^28087390 is an apocalyptic number.

28087390 is a deficient number, since it is larger than the sum of its proper divisors (22469930).

28087390 is a wasteful number, since it uses less digits than its factorization.

28087390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808746.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28087390 is about 5299.7537678651. The cubic root of 28087390 is about 303.9744827959.

The spelling of 28087390 in words is "twenty-eight million, eighty-seven thousand, three hundred ninety".