28201740 has 96 divisors (see below), whose sum is σ = 91445760. Its totient is φ = 6360576.

The previous prime is 28201721. The next prime is 28201781. The reversal of 28201740 is 4710282.

It is a self number, because there is not a number n which added to its sum of digits gives 28201740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34456 + ... + 35264.

It is an arithmetic number, because the mean of its divisors is an integer number (952560).

Almost surely, 2^28201740 is an apocalyptic number.

28201740 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 28201740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45722880).

28201740 is an abundant number, since it is smaller than the sum of its proper divisors (63244020).

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

28201740 is a wasteful number, since it uses less digits than its factorization.

28201740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 28201740 is about 5310.5310468916. The cubic root of 28201740 is about 304.3864401110.

It can be divided in two parts, 2820 and 1740, that added together give a triangular number (4560 = T₉₅).

The spelling of 28201740 in words is "twenty-eight million, two hundred one thousand, seven hundred forty".