28861066 has 8 divisors (see below), whose sum is σ = 46621764. Its totient is φ = 13320480.

The previous prime is 28861051. The next prime is 28861103. The reversal of 28861066 is 66016882.

It can be written as a sum of positive squares in 2 ways, for example, as 28783225 + 77841 = 5365^2 + 279^2 .

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

It is a super-2 number, since 2×28861066² = 1665922261312712, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 554995 + ... + 555046.

Almost surely, 2^28861066 is an apocalyptic number.

28861066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28861066 is a deficient number, since it is larger than the sum of its proper divisors (17760698).

28861066 is a wasteful number, since it uses less digits than its factorization.

28861066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110056.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 28861066 is about 5372.2496218996. The cubic root of 28861066 is about 306.7402656264.

The spelling of 28861066 in words is "twenty-eight million, eight hundred sixty-one thousand, sixty-six".