28362720 has 96 divisors (see below), whose sum is σ = 91814688. Its totient is φ = 7354368.

The previous prime is 28362713. The next prime is 28362721. The reversal of 28362720 is 2726382.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28362721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16962 + ... + 18558.

It is an arithmetic number, because the mean of its divisors is an integer number (956403).

Almost surely, 2^28362720 is an apocalyptic number.

28362720 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 28362720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45907344).

28362720 is an abundant number, since it is smaller than the sum of its proper divisors (63451968).

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

28362720 is a wasteful number, since it uses less digits than its factorization.

28362720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1644 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 28362720 is about 5325.6661555152. Note that the first 3 decimals coincide. The cubic root of 28362720 is about 304.9645036178.

The spelling of 28362720 in words is "twenty-eight million, three hundred sixty-two thousand, seven hundred twenty".