2816440 has 64 divisors (see below), whose sum is σ = 7140960. Its totient is φ = 990720.

The previous prime is 2816399. The next prime is 2816453. The reversal of 2816440 is 446182.

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 15 ways as a sum of consecutive naturals, for example, 16194 + ... + 16366.

2^2816440 is an apocalyptic number.

2816440 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 2816440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3570480).

2816440 is an abundant number, since it is smaller than the sum of its proper divisors (4324520).

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

2816440 is a wasteful number, since it uses less digits than its factorization.

2816440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 2816440 is about 1678.2252530575. The cubic root of 2816440 is about 141.2212879224.

It can be divided in two parts, 28 and 16440, that multiplied together give a triangular number (460320 = T₉₅₉).

The spelling of 2816440 in words is "two million, eight hundred sixteen thousand, four hundred forty".