28409740380 has 432 divisors, whose sum is σ = 104756652000. Its totient is φ = 6206118912.

The previous prime is 28409740339. The next prime is 28409740453. The reversal of 28409740380 is 8304790482.

28409740380 is a `hidden beast` number, since 2 + 84 + 0 + 97 + 403 + 80 = 666.

It is a super-2 number, since 2×28409740380² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 27879511 + ... + 27880529.

It is an arithmetic number, because the mean of its divisors is an integer number (242492250).

Almost surely, 2^28409740380 is an apocalyptic number.

28409740380 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 28409740380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52378326000).

28409740380 is an abundant number, since it is smaller than the sum of its proper divisors (76346911620).

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

28409740380 is a wasteful number, since it uses less digits than its factorization.

28409740380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 28409740380 in words is "twenty-eight billion, four hundred nine million, seven hundred forty thousand, three hundred eighty".