28559740 has 48 divisors (see below), whose sum is σ = 66971520. Its totient is φ = 10140480.

The previous prime is 28559723. The next prime is 28559743. The reversal of 28559740 is 4795582.

It is a junction number, because it is equal to n+sod(n) for n = 28559693 and 28559702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28559743) 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, 7951 + ... + 10969.

It is an arithmetic number, because the mean of its divisors is an integer number (1395240).

Almost surely, 2^28559740 is an apocalyptic number.

28559740 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 28559740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33485760).

28559740 is an abundant number, since it is smaller than the sum of its proper divisors (38411780).

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

28559740 is a wasteful number, since it uses less digits than its factorization.

28559740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082 (or 3080 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 28559740 is about 5344.1313606610. The cubic root of 28559740 is about 305.6690142963.

It can be divided in two parts, 285 and 59740, that added together give a square (60025 = 245²).

The spelling of 28559740 in words is "twenty-eight million, five hundred fifty-nine thousand, seven hundred forty".