28458012 has 48 divisors (see below), whose sum is σ = 73382400. Its totient is φ = 8511360.

The previous prime is 28458011. The next prime is 28458013. The reversal of 28458012 is 21085482.

It is an interprime number because it is at equal distance from previous prime (28458011) and next prime (28458013).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28458011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9064 + ... + 11792.

It is an arithmetic number, because the mean of its divisors is an integer number (1528800).

Almost surely, 2^28458012 is an apocalyptic number.

28458012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28458012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36691200).

28458012 is an abundant number, since it is smaller than the sum of its proper divisors (44924388).

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

28458012 is a wasteful number, since it uses less digits than its factorization.

28458012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826 (or 2824 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 28458012 is about 5334.6051400268. The cubic root of 28458012 is about 305.3056579269.

The spelling of 28458012 in words is "twenty-eight million, four hundred fifty-eight thousand, twelve".