1066440 has 32 divisors (see below), whose sum is σ = 3199680. Its totient is φ = 284352.

The previous prime is 1066433. The next prime is 1066447. The reversal of 1066440 is 446601.

It is an interprime number because it is at equal distance from previous prime (1066433) and next prime (1066447).

It is a super-2 number, since 2×1066440² = 2274588547200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066447) 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, 4324 + ... + 4563.

It is an arithmetic number, because the mean of its divisors is an integer number (99990).

2^1066440 is an apocalyptic number.

1066440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066440 is an abundant number, since it is smaller than the sum of its proper divisors (2133240).

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

1066440 is a wasteful number, since it uses less digits than its factorization.

1066440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8901 (or 8897 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1066440 is about 1032.6858186302. The cubic root of 1066440 is about 102.1673531062.

The spelling of 1066440 in words is "one million, sixty-six thousand, four hundred forty".