2293840 has 40 divisors (see below), whose sum is σ = 5443848. Its totient is φ = 898560.

The previous prime is 2293831. The next prime is 2293847. The reversal of 2293840 is 483922.

It can be written as a sum of positive squares in 4 ways, for example, as 322624 + 1971216 = 568^2 + 1404^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a d-powerful number, because it can be written as 2 + 2¹⁷ + 9⁴ + 3¹⁰ + 8⁷ + 4 + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 2293799 and 2293808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2293847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3970 + ... + 4510.

2^2293840 is an apocalyptic number.

2293840 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 2293840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2721924).

2293840 is an abundant number, since it is smaller than the sum of its proper divisors (3150008).

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

2293840 is a wasteful number, since it uses less digits than its factorization.

2293840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607 (or 601 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2293840 is about 1514.5428353137. The cubic root of 2293840 is about 131.8826627923.

Adding to 2293840 its product of nonzero digits (3456), we get a triangular number (2297296 = T₂₁₄₃).

The spelling of 2293840 in words is "two million, two hundred ninety-three thousand, eight hundred forty".