1000780794 has 24 divisors (see below), whose sum is σ = 2335155732. Its totient is φ = 307932480.

The previous prime is 1000780793. The next prime is 1000780799. The reversal of 1000780794 is 4970870001.

It can be written as a sum of positive squares in 2 ways, for example, as 1000773225 + 7569 = 31635^2 + 87^2 .

It is not an unprimeable number, because it can be changed into a prime (1000780793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2138187 + ... + 2138654.

Almost surely, 2^1000780794 is an apocalyptic number.

1000780794 is an abundant number, since it is smaller than the sum of its proper divisors (1334374938).

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

1000780794 is a wasteful number, since it uses less digits than its factorization.

1000780794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276862 (or 4276859 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 1000780794 is about 31635.1196299303. The cubic root of 1000780794 is about 1000.2601969583.

The spelling of 1000780794 in words is "one billion, seven hundred eighty thousand, seven hundred ninety-four".