28047270 has 16 divisors (see below), whose sum is σ = 67313520. Its totient is φ = 7479264.

The previous prime is 28047269. The next prime is 28047301. The reversal of 28047270 is 7274082.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 934909 = 28047270 / (2 + 8 + 0 + 4 + 7 + 2 + 7 + 0).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467425 + ... + 467484.

It is an arithmetic number, because the mean of its divisors is an integer number (4207095).

Almost surely, 2^28047270 is an apocalyptic number.

28047270 is an abundant number, since it is smaller than the sum of its proper divisors (39266250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28047270 is a wasteful number, since it uses less digits than its factorization.

28047270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934919.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 28047270 is about 5295.9673337361. The cubic root of 28047270 is about 303.8296815461.

The spelling of 28047270 in words is "twenty-eight million, forty-seven thousand, two hundred seventy".