2851440 has 60 divisors (see below), whose sum is σ = 8921304. Its totient is φ = 753408.

The previous prime is 2851423. The next prime is 2851441. The reversal of 2851440 is 441582.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2851440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2851441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26106 + ... + 26214.

2^2851440 is an apocalyptic number.

2851440 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 2851440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4460652).

2851440 is an abundant number, since it is smaller than the sum of its proper divisors (6069864).

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

2851440 is a wasteful number, since it uses less digits than its factorization.

2851440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 2851440 is about 1688.6207389464. The cubic root of 2851440 is about 141.8038686170.

The spelling of 2851440 in words is "two million, eight hundred fifty-one thousand, four hundred forty".