28651300 has 18 divisors (see below), whose sum is σ = 62173538. Its totient is φ = 11460480.

The previous prime is 28651291. The next prime is 28651303. The reversal of 28651300 is 315682.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7396 + 28643904 = 86^2 + 5352^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (28651303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143157 + ... + 143356.

Almost surely, 2^28651300 is an apocalyptic number.

28651300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28651300 is an abundant number, since it is smaller than the sum of its proper divisors (33522238).

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

28651300 is a wasteful number, since it uses less digits than its factorization.

28651300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286527 (or 286520 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 28651300 is about 5352.6909120554. The cubic root of 28651300 is about 305.9953151204.

Adding to 28651300 its reverse (315682), we get a palindrome (28966982).

The spelling of 28651300 in words is "twenty-eight million, six hundred fifty-one thousand, three hundred".