28387270 has 8 divisors (see below), whose sum is σ = 51097104. Its totient is φ = 11354904.

The previous prime is 28387253. The next prime is 28387279. The reversal of 28387270 is 7278382.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28387279) 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 3 ways as a sum of consecutive naturals, for example, 1419354 + ... + 1419373.

It is an arithmetic number, because the mean of its divisors is an integer number (6387138).

Almost surely, 2^28387270 is an apocalyptic number.

28387270 is a deficient number, since it is larger than the sum of its proper divisors (22709834).

28387270 is a wasteful number, since it uses less digits than its factorization.

28387270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838734.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 28387270 is about 5327.9705329515. The cubic root of 28387270 is about 305.0524679064.

The spelling of 28387270 in words is "twenty-eight million, three hundred eighty-seven thousand, two hundred seventy".