28943460 has 384 divisors, whose sum is σ = 120422400. Its totient is φ = 5598720.

The previous prime is 28943449. The next prime is 28943471. The reversal of 28943460 is 6434982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28943449) and next prime (28943471).

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 933645 + ... + 933675.

It is an arithmetic number, because the mean of its divisors is an integer number (313600).

Almost surely, 2^28943460 is an apocalyptic number.

28943460 is a gapful number since it is divisible by the number (20) 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 28943460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60211200).

28943460 is an abundant number, since it is smaller than the sum of its proper divisors (91478940).

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

28943460 is a wasteful number, since it uses less digits than its factorization.

28943460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 28943460 is about 5379.9126386959. The cubic root of 28943460 is about 307.0318873887.

It can be divided in two parts, 28943 and 460, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 28943460 in words is "twenty-eight million, nine hundred forty-three thousand, four hundred sixty".