2781474380 has 96 divisors (see below), whose sum is σ = 6427330560. Its totient is φ = 1006525440.

The previous prime is 2781474359. The next prime is 2781474383. The reversal of 2781474380 is 834741872.

It is not an unprimeable number, because it can be changed into a prime (2781474383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1717211 + ... + 1718829.

It is an arithmetic number, because the mean of its divisors is an integer number (66951360).

Almost surely, 2^2781474380 is an apocalyptic number.

2781474380 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 2781474380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3213665280).

2781474380 is an abundant number, since it is smaller than the sum of its proper divisors (3645856180).

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

2781474380 is a wasteful number, since it uses less digits than its factorization.

2781474380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839 (or 1837 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 2781474380 is about 52739.6850578386. The cubic root of 2781474380 is about 1406.3443994440.

The spelling of 2781474380 in words is "two billion, seven hundred eighty-one million, four hundred seventy-four thousand, three hundred eighty".