2275840 has 80 divisors (see below), whose sum is σ = 6285312. Its totient is φ = 774144.

The previous prime is 2275837. The next prime is 2275843. The reversal of 2275840 is 485722.

It is an interprime number because it is at equal distance from previous prime (2275837) and next prime (2275843).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 2275799 and 2275808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2275843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17857 + ... + 17983.

2^2275840 is an apocalyptic number.

2275840 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 2275840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3142656).

2275840 is an abundant number, since it is smaller than the sum of its proper divisors (4009472).

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

2275840 is an equidigital number, since it uses as much as digits as its factorization.

2275840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 2275840 is about 1508.5887444894. The cubic root of 2275840 is about 131.5367908739.

The spelling of 2275840 in words is "two million, two hundred seventy-five thousand, eight hundred forty".