28490786600 has 24 divisors (see below), whose sum is σ = 66241079310. Its totient is φ = 11396314560.

The previous prime is 28490786549. The next prime is 28490786609. The reversal of 28490786600 is 668709482.

It can be written as a sum of positive squares in 3 ways, for example, as 10394618116 + 18096168484 = 101954^2 + 134522^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (28490786609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71226767 + ... + 71227166.

Almost surely, 2^28490786600 is an apocalyptic number.

28490786600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28490786600 is an abundant number, since it is smaller than the sum of its proper divisors (37750292710).

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

28490786600 is a wasteful number, since it uses less digits than its factorization.

28490786600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142453949 (or 142453940 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 28490786600 in words is "twenty-eight billion, four hundred ninety million, seven hundred eighty-six thousand, six hundred".