28012300 has 36 divisors (see below), whose sum is σ = 61030816. Its totient is φ = 11160000.

The previous prime is 28012297. The next prime is 28012301. The reversal of 28012300 is 321082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28012301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36925 + ... + 37675.

Almost surely, 2^28012300 is an apocalyptic number.

28012300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28012300 is an abundant number, since it is smaller than the sum of its proper divisors (33018516).

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

28012300 is a wasteful number, since it uses less digits than its factorization.

28012300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 1131 counting only the distinct ones).

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

The square root of 28012300 is about 5292.6647352728. The cubic root of 28012300 is about 303.7033550168.

Adding to 28012300 its reverse (321082), we get a palindrome (28333382).

It can be divided in two parts, 280 and 12300, that multiplied together give a triangular number (3444000 = T₂₆₂₄).

The spelling of 28012300 in words is "twenty-eight million, twelve thousand, three hundred".