780042956 has 108 divisors (see below), whose sum is σ = 1803428928. Its totient is φ = 293832000.

The previous prime is 780042937. The next prime is 780042959. The reversal of 780042956 is 659240087.

It is not an unprimeable number, because it can be changed into a prime (780042959) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 734666 + ... + 735726.

It is an arithmetic number, because the mean of its divisors is an integer number (16698416).

Almost surely, 2^780042956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 780042956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (901714464).

780042956 is an abundant number, since it is smaller than the sum of its proper divisors (1023385972).

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

780042956 is a wasteful number, since it uses less digits than its factorization.

780042956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 780042956 is about 27929.2491127134. The cubic root of 780042956 is about 920.5333061050.

The spelling of 780042956 in words is "seven hundred eighty million, forty-two thousand, nine hundred fifty-six".