1078321440 has 432 divisors, whose sum is σ = 4203021312. Its totient is φ = 231662592.

The previous prime is 1078321427. The next prime is 1078321469. The reversal of 1078321440 is 441238701.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1078321398 and 1078321407.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8490657 + ... + 8490783.

It is an arithmetic number, because the mean of its divisors is an integer number (9729216).

Almost surely, 2^1078321440 is an apocalyptic number.

1078321440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1078321440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2101510656).

1078321440 is an abundant number, since it is smaller than the sum of its proper divisors (3124699872).

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

1078321440 is a wasteful number, since it uses less digits than its factorization.

1078321440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 1078321440 is about 32837.8050423593. The cubic root of 1078321440 is about 1025.4537558695.

It can be divided in two parts, 10783 and 21440, that added together give a palindrome (32223).

The spelling of 1078321440 in words is "one billion, seventy-eight million, three hundred twenty-one thousand, four hundred forty".