28343502 has 48 divisors (see below), whose sum is σ = 67375152. Its totient is φ = 8540160.

The previous prime is 28343489. The next prime is 28343507. The reversal of 28343502 is 20534382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28343507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50608 + ... + 51164.

It is an arithmetic number, because the mean of its divisors is an integer number (1403649).

Almost surely, 2^28343502 is an apocalyptic number.

28343502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28343502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33687576).

28343502 is an abundant number, since it is smaller than the sum of its proper divisors (39031650).

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

28343502 is a wasteful number, since it uses less digits than its factorization.

28343502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 830 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 28343502 is about 5323.8615684482. The cubic root of 28343502 is about 304.8956088145.

Adding to 28343502 its reverse (20534382), we get a palindrome (48877884).

It can be divided in two parts, 2834 and 3502, that added together give a palindrome (6336).

The spelling of 28343502 in words is "twenty-eight million, three hundred forty-three thousand, five hundred two".