2781016 has 32 divisors (see below), whose sum is σ = 6078240. Its totient is φ = 1168128.

The previous prime is 2781007. The next prime is 2781017. The reversal of 2781016 is 6101872.

2781016 is digitally balanced in base 5 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

2781016 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2500 + ... + 3436.

It is an arithmetic number, because the mean of its divisors is an integer number (189945).

2^2781016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2781016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3039120).

2781016 is an abundant number, since it is smaller than the sum of its proper divisors (3297224).

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

2781016 is a wasteful number, since it uses less digits than its factorization.

2781016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 999 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 2781016 is about 1667.6378503740. The cubic root of 2781016 is about 140.6267141190.

Adding to 2781016 its reverse (6101872), we get a palindrome (8882888).

The spelling of 2781016 in words is "two million, seven hundred eighty-one thousand, sixteen".