1040255440 has 40 divisors (see below), whose sum is σ = 2764108800. Its totient is φ = 356658816.

The previous prime is 1040255429. The next prime is 1040255479. The reversal of 1040255440 is 445520401.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 928240 + ... + 929359.

It is an arithmetic number, because the mean of its divisors is an integer number (69102720).

Almost surely, 2^1040255440 is an apocalyptic number.

1040255440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1040255440 is an abundant number, since it is smaller than the sum of its proper divisors (1723853360).

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

1040255440 is a wasteful number, since it uses less digits than its factorization.

1040255440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857619 (or 1857613 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1040255440 is about 32252.9911791139. The cubic root of 1040255440 is about 1013.2423462088.

Adding to 1040255440 its reverse (445520401), we get a palindrome (1485775841).

The spelling of 1040255440 in words is "one billion, forty million, two hundred fifty-five thousand, four hundred forty".