28070066 has 16 divisors (see below), whose sum is σ = 43960320. Its totient is φ = 13427040.

The previous prime is 28070047. The next prime is 28070069. The reversal of 28070066 is 66007082.

It is not an unprimeable number, because it can be changed into a prime (28070069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2975 + ... + 8061.

It is an arithmetic number, because the mean of its divisors is an integer number (2747520).

Almost surely, 2^28070066 is an apocalyptic number.

28070066 is a deficient number, since it is larger than the sum of its proper divisors (15890254).

28070066 is a wasteful number, since it uses less digits than its factorization.

28070066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5209.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 28070066 is about 5298.1191002091. The cubic root of 28070066 is about 303.9119738788.

The spelling of 28070066 in words is "twenty-eight million, seventy thousand, sixty-six".