28341720 has 192 divisors, whose sum is σ = 106647840. Its totient is φ = 6451200.

The previous prime is 28341707. The next prime is 28341721. The reversal of 28341720 is 2714382.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28341721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67110 + ... + 67530.

Almost surely, 2^28341720 is an apocalyptic number.

28341720 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 28341720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53323920).

28341720 is an abundant number, since it is smaller than the sum of its proper divisors (78306120).

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

28341720 is a wasteful number, since it uses less digits than its factorization.

28341720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28341720 is about 5323.6942060941. The cubic root of 28341720 is about 304.8892189271.

It can be divided in two parts, 2834 and 1720, that added together give a palindrome (4554).

The spelling of 28341720 in words is "twenty-eight million, three hundred forty-one thousand, seven hundred twenty".