28301812 has 36 divisors (see below), whose sum is σ = 62856864. Its totient is φ = 11025840.

The previous prime is 28301809. The next prime is 28301813. The reversal of 28301812 is 21810382.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28301813) 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 11 ways as a sum of consecutive naturals, for example, 4408 + ... + 8719.

It is an arithmetic number, because the mean of its divisors is an integer number (1746024).

Almost surely, 2^28301812 is an apocalyptic number.

28301812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28301812 is an abundant number, since it is smaller than the sum of its proper divisors (34555052).

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

28301812 is a wasteful number, since it uses less digits than its factorization.

28301812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13156 (or 13147 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 28301812 is about 5319.9447365551. The cubic root of 28301812 is about 304.7460467831.

The spelling of 28301812 in words is "twenty-eight million, three hundred one thousand, eight hundred twelve".