43255840 has 48 divisors (see below), whose sum is σ = 102596760. Its totient is φ = 17233920.

The previous prime is 43255829. The next prime is 43255841. The reversal of 43255840 is 4855234.

43255840 = T₂₄₀ + T₂₄₁ + ... + T₆₄₈.

It can be written as a sum of positive squares in 4 ways, for example, as 43086096 + 169744 = 6564^2 + 412^2 .

It is not an unprimeable number, because it can be changed into a prime (43255841) 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, 65110 + ... + 65770.

Almost surely, 2^43255840 is an apocalyptic number.

43255840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43255840 is an abundant number, since it is smaller than the sum of its proper divisors (59340920).

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

43255840 is a wasteful number, since it uses less digits than its factorization.

43255840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 43255840 is about 6576.9172109735. The cubic root of 43255840 is about 351.0332460399.

The spelling of 43255840 in words is "forty-three million, two hundred fifty-five thousand, eight hundred forty".