2863440 has 120 divisors (see below), whose sum is σ = 9952488. Its totient is φ = 737280.

The previous prime is 2863423. The next prime is 2863453. The reversal of 2863440 is 443682.

2863440 is a `hidden beast` number, since 28 + 634 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 576 + 2862864 = 24^2 + 1692^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is an Ulam number.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29472 + ... + 29568.

2^2863440 is an apocalyptic number.

2863440 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 2863440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4976244).

2863440 is an abundant number, since it is smaller than the sum of its proper divisors (7089048).

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

2863440 is a wasteful number, since it uses less digits than its factorization.

2863440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 2863440 is about 1692.1702042052. The cubic root of 2863440 is about 142.0025126845.

The spelling of 2863440 in words is "two million, eight hundred sixty-three thousand, four hundred forty".