28361502 has 72 divisors (see below), whose sum is σ = 69667416. Its totient is φ = 8596368.

The previous prime is 28361483. The next prime is 28361537. The reversal of 28361502 is 20516382.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 423273 + ... + 423339.

It is an arithmetic number, because the mean of its divisors is an integer number (967603).

Almost surely, 2^28361502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28361502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34833708).

28361502 is an abundant number, since it is smaller than the sum of its proper divisors (41305914).

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

28361502 is an equidigital number, since it uses as much as digits as its factorization.

28361502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 28361502 is about 5325.5518023957. The cubic root of 28361502 is about 304.9601381211.

Adding to 28361502 its reverse (20516382), we get a palindrome (48877884).

The spelling of 28361502 in words is "twenty-eight million, three hundred sixty-one thousand, five hundred two".