28070386 has 8 divisors (see below), whose sum is σ = 42134364. Its totient is φ = 14025600.

The previous prime is 28070377. The next prime is 28070411. The reversal of 28070386 is 68307082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27762361 + 308025 = 5269^2 + 555^2 .

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

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, 295 + ... + 7498.

Almost surely, 2^28070386 is an apocalyptic number.

28070386 is a deficient number, since it is larger than the sum of its proper divisors (14063978).

28070386 is a wasteful number, since it uses less digits than its factorization.

28070386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9596.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28070386 is about 5298.1492995196. The cubic root of 28070386 is about 303.9131287445.

The spelling of 28070386 in words is "twenty-eight million, seventy thousand, three hundred eighty-six".