28600000 has 168 divisors, whose sum is σ = 83338416. Its totient is φ = 9600000.

The previous prime is 28599937. The next prime is 28600009. The reversal of 28600000 is 682.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (28600009) 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 23 ways as a sum of consecutive naturals, for example, 2199994 + ... + 2200006.

It is an arithmetic number, because the mean of its divisors is an integer number (496062).

Almost surely, 2^28600000 is an apocalyptic number.

28600000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28600000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41669208).

28600000 is an abundant number, since it is smaller than the sum of its proper divisors (54738416).

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

28600000 is an equidigital number, since it uses as much as digits as its factorization.

28600000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61 (or 31 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 28600000 is about 5347.8967828484. The cubic root of 28600000 is about 305.8125783535.

Adding to 28600000 its reverse (682), we get a palindrome (28600682).

The spelling of 28600000 in words is "twenty-eight million, six hundred thousand".