1078663440 has 80 divisors (see below), whose sum is σ = 3519864000. Its totient is φ = 272503296.

The previous prime is 1078663409. The next prime is 1078663493. The reversal of 1078663440 is 443668701.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113715 + ... + 122834.

It is an arithmetic number, because the mean of its divisors is an integer number (43998300).

Almost surely, 2^1078663440 is an apocalyptic number.

1078663440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1078663440 is an abundant number, since it is smaller than the sum of its proper divisors (2441200560).

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

1078663440 is a wasteful number, since it uses less digits than its factorization.

1078663440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236584 (or 236578 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 1078663440 is about 32843.0120421377. The cubic root of 1078663440 is about 1025.5621552458.

The spelling of 1078663440 in words is "one billion, seventy-eight million, six hundred sixty-three thousand, four hundred forty".