1078782640 has 80 divisors (see below), whose sum is σ = 2788321536. Its totient is φ = 385459200.

The previous prime is 1078782613. The next prime is 1078782641. The reversal of 1078782640 is 462878701.

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

It is not an unprimeable number, because it can be changed into a prime (1078782641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15510 + ... + 48970.

Almost surely, 2^1078782640 is an apocalyptic number.

1078782640 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 1078782640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1394160768).

1078782640 is an abundant number, since it is smaller than the sum of its proper divisors (1709538896).

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

1078782640 is a wasteful number, since it uses less digits than its factorization.

1078782640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33518 (or 33512 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 1078782640 is about 32844.8266854919. The cubic root of 1078782640 is about 1025.5999311642.

The spelling of 1078782640 in words is "one billion, seventy-eight million, seven hundred eighty-two thousand, six hundred forty".