28340424 has 144 divisors (see below), whose sum is σ = 92699100. Its totient is φ = 7789824.

The previous prime is 28340423. The next prime is 28340467. The reversal of 28340424 is 42404382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27562500 + 777924 = 5250^2 + 882^2 .

It is not an unprimeable number, because it can be changed into a prime (28340423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 102174 + ... + 102450.

Almost surely, 2^28340424 is an apocalyptic number.

28340424 is a gapful number since it is divisible by the number (24) 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 28340424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46349550).

28340424 is an abundant number, since it is smaller than the sum of its proper divisors (64358676).

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

28340424 is a wasteful number, since it uses less digits than its factorization.

28340424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 28340424 is about 5323.5724847136. The cubic root of 28340424 is about 304.8845715680.

The spelling of 28340424 in words is "twenty-eight million, three hundred forty thousand, four hundred twenty-four".