Search a number
-
+
28682860 = 2251434143
BaseRepresentation
bin110110101101…
…0101001101100
31222222020111011
41231122221230
524320322420
62502435004
7465541333
oct155325154
958866434
1028682860
1115210948
129732a64
135c3360b
143b48d1a
1527b895a
hex1b5aa6c

28682860 has 12 divisors (see below), whose sum is σ = 60234048. Its totient is φ = 11473136.

The previous prime is 28682813. The next prime is 28682867. The reversal of 28682860 is 6828682.

It is not an unprimeable number, because it can be changed into a prime (28682867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717052 + ... + 717091.

It is an arithmetic number, because the mean of its divisors is an integer number (5019504).

Almost surely, 228682860 is an apocalyptic number.

28682860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28682860 is an abundant number, since it is smaller than the sum of its proper divisors (31551188).

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

28682860 is a wasteful number, since it uses less digits than its factorization.

28682860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434152 (or 1434150 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 28682860 is about 5355.6381505849. The cubic root of 28682860 is about 306.1076272836.

The spelling of 28682860 in words is "twenty-eight million, six hundred eighty-two thousand, eight hundred sixty".

Divisors: 1 2 4 5 10 20 1434143 2868286 5736572 7170715 14341430 28682860