28458612 has 216 divisors, whose sum is σ = 96727176. Its totient is φ = 6967296.

The previous prime is 28458611. The next prime is 28458623. The reversal of 28458612 is 21685482.

It can be written as a sum of positive squares in 4 ways, for example, as 3896676 + 24561936 = 1974^2 + 4956^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28458611) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 389808 + ... + 389880.

It is an arithmetic number, because the mean of its divisors is an integer number (447811).

Almost surely, 2^28458612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28458612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48363588).

28458612 is an abundant number, since it is smaller than the sum of its proper divisors (68268564).

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

28458612 is a wasteful number, since it uses less digits than its factorization.

28458612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 115 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 28458612 is about 5334.6613763200. The cubic root of 28458612 is about 305.3078035688.

The spelling of 28458612 in words is "twenty-eight million, four hundred fifty-eight thousand, six hundred twelve".