28041012 has 24 divisors (see below), whose sum is σ = 72699200. Its totient is φ = 9346968.

The previous prime is 28041011. The next prime is 28041043. The reversal of 28041012 is 21014082.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28041011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129712 + ... + 129927.

Almost surely, 2^28041012 is an apocalyptic number.

It is an amenable number.

28041012 is an abundant number, since it is smaller than the sum of its proper divisors (44658188).

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

28041012 is a wasteful number, since it uses less digits than its factorization.

28041012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259652 (or 259644 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 28041012 is about 5295.3764738685. The cubic root of 28041012 is about 303.8070827028.

Adding to 28041012 its reverse (21014082), we get a palindrome (49055094).

The spelling of 28041012 in words is "twenty-eight million, forty-one thousand, twelve".