28866460 has 96 divisors (see below), whose sum is σ = 73156608. Its totient is φ = 9361920.

The previous prime is 28866443. The next prime is 28866473. The reversal of 28866460 is 6466882.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269727 + ... + 269833.

It is an arithmetic number, because the mean of its divisors is an integer number (762048).

Almost surely, 2^28866460 is an apocalyptic number.

28866460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

28866460 is the 4387-th pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28866460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36578304).

28866460 is an abundant number, since it is smaller than the sum of its proper divisors (44290148).

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

28866460 is a wasteful number, since it uses less digits than its factorization.

28866460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 28866460 is about 5372.7516227721. The cubic root of 28866460 is about 306.7593738826.

The spelling of 28866460 in words is "twenty-eight million, eight hundred sixty-six thousand, four hundred sixty".