1078806440 has 32 divisors (see below), whose sum is σ = 2431329480. Its totient is φ = 430808832.

The previous prime is 1078806437. The next prime is 1078806457. The reversal of 1078806440 is 446088701.

It can be written as a sum of positive squares in 4 ways, for example, as 349914436 + 728892004 = 18706^2 + 26998^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1078806394 and 1078806403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2522 + ... + 46518.

Almost surely, 2^1078806440 is an apocalyptic number.

1078806440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1078806440 is an abundant number, since it is smaller than the sum of its proper divisors (1352523040).

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

1078806440 is a wasteful number, since it uses less digits than its factorization.

1078806440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44621 (or 44617 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 1078806440 is about 32845.1889932148. The cubic root of 1078806440 is about 1025.6074733381.

The spelling of 1078806440 in words is "one billion, seventy-eight million, eight hundred six thousand, four hundred forty".