28346786 has 32 divisors (see below), whose sum is σ = 49351680. Its totient is φ = 12093696.

The previous prime is 28346783. The next prime is 28346797. The reversal of 28346786 is 68764382.

It is a super-3 number, since 3×28346786³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28346783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25535 + ... + 26621.

It is an arithmetic number, because the mean of its divisors is an integer number (1542240).

Almost surely, 2^28346786 is an apocalyptic number.

28346786 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28346786 is a deficient number, since it is larger than the sum of its proper divisors (21004894).

28346786 is a wasteful number, since it uses less digits than its factorization.

28346786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178.

The product of its digits is 387072, while the sum is 44.

The square root of 28346786 is about 5324.1699822601. The cubic root of 28346786 is about 304.9073838651.

The spelling of 28346786 in words is "twenty-eight million, three hundred forty-six thousand, seven hundred eighty-six".