28681862 has 16 divisors (see below), whose sum is σ = 47032272. Its totient is φ = 13009920.

The previous prime is 28681853. The next prime is 28681871. The reversal of 28681862 is 26818682.

It is an interprime number because it is at equal distance from previous prime (28681853) and next prime (28681871).

It is a super-3 number, since 3×28681862³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 12518 + ... + 14630.

It is an arithmetic number, because the mean of its divisors is an integer number (2939517).

Almost surely, 2^28681862 is an apocalyptic number.

28681862 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28681862 is a deficient number, since it is larger than the sum of its proper divisors (18350410).

28681862 is a wasteful number, since it uses less digits than its factorization.

28681862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743.

The product of its digits is 73728, while the sum is 41.

The square root of 28681862 is about 5355.5449769375. The cubic root of 28681862 is about 306.1040769757.

The spelling of 28681862 in words is "twenty-eight million, six hundred eighty-one thousand, eight hundred sixty-two".