Search a number
-
+
28387886088 = 2331182828587
BaseRepresentation
bin11010011100000011…
…001100010000001000
32201021101211000211110
4122130003030100020
5431114244323323
621012522530320
72023323023202
oct323403142010
981241730743
1028387886088
1111048248a91
1256030669a0
1328a53aa543
1415342bd772
15b12335793
hex69c0cc408

28387886088 has 16 divisors (see below), whose sum is σ = 70969715280. Its totient is φ = 9462628688.

The previous prime is 28387886083. The next prime is 28387886113. The reversal of 28387886088 is 88068878382.

It is not an unprimeable number, because it can be changed into a prime (28387886083) 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, 591414270 + ... + 591414317.

It is an arithmetic number, because the mean of its divisors is an integer number (4435607205).

Almost surely, 228387886088 is an apocalyptic number.

It is an amenable number.

28387886088 is an abundant number, since it is smaller than the sum of its proper divisors (42581829192).

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

28387886088 is a wasteful number, since it uses less digits than its factorization.

28387886088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182828596 (or 1182828592 counting only the distinct ones).

The product of its (nonzero) digits is 66060288, while the sum is 66.

The spelling of 28387886088 in words is "twenty-eight billion, three hundred eighty-seven million, eight hundred eighty-six thousand, eighty-eight".

Divisors: 1 2 3 4 6 8 12 24 1182828587 2365657174 3548485761 4731314348 7096971522 9462628696 14193943044 28387886088