2786281240 has 48 divisors (see below), whose sum is σ = 6475682880. Its totient is φ = 1077840960.

The previous prime is 2786281193. The next prime is 2786281291. The reversal of 2786281240 is 421826872.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2786281193 and 2786281202.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1858011 + ... + 1859509.

It is an arithmetic number, because the mean of its divisors is an integer number (134910060).

Almost surely, 2^2786281240 is an apocalyptic number.

2786281240 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 2786281240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3237841440).

2786281240 is an abundant number, since it is smaller than the sum of its proper divisors (3689401640).

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

2786281240 is an equidigital number, since it uses as much as digits as its factorization.

2786281240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3040 (or 1537 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 2786281240 is about 52785.2369512537. The cubic root of 2786281240 is about 1407.1540671779.

The spelling of 2786281240 in words is "two billion, seven hundred eighty-six million, two hundred eighty-one thousand, two hundred forty".