28043496 has 80 divisors (see below), whose sum is σ = 84615300. Its totient is φ = 8626176.

The previous prime is 28043471. The next prime is 28043507. The reversal of 28043496 is 69434082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26316900 + 1726596 = 5130^2 + 1314^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28043496.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6760 + ... + 10088.

Almost surely, 2^28043496 is an apocalyptic number.

28043496 is a gapful number since it is divisible by the number (26) 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 28043496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42307650).

28043496 is an abundant number, since it is smaller than the sum of its proper divisors (56571804).

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

28043496 is a wasteful number, since it uses less digits than its factorization.

28043496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360 (or 3347 counting only the distinct ones).

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

The square root of 28043496 is about 5295.6110129049. The cubic root of 28043496 is about 303.8160533077.

The spelling of 28043496 in words is "twenty-eight million, forty-three thousand, four hundred ninety-six".