2255240 has 32 divisors (see below), whose sum is σ = 5465880. Its totient is φ = 832512.

The previous prime is 2255233. The next prime is 2255249. The reversal of 2255240 is 425522.

It can be written as a sum of positive squares in 4 ways, for example, as 662596 + 1592644 = 814^2 + 1262^2 .

It is a super-2 number, since 2×2255240² = 10172214915200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2255249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1649 + ... + 2688.

2^2255240 is an apocalyptic number.

2255240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2255240 is an abundant number, since it is smaller than the sum of its proper divisors (3210640).

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

2255240 is a wasteful number, since it uses less digits than its factorization.

2255240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4361 (or 4357 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 2255240 is about 1501.7456509010. The cubic root of 2255240 is about 131.1387144367.

The spelling of 2255240 in words is "two million, two hundred fifty-five thousand, two hundred forty".