781020936 has 96 divisors (see below), whose sum is σ = 2337154560. Its totient is φ = 234364416.

The previous prime is 781020923. The next prime is 781020983. The reversal of 781020936 is 639020187.

781020936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 781020936.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14281 + ... + 42023.

It is an arithmetic number, because the mean of its divisors is an integer number (24345360).

Almost surely, 2^781020936 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 781020936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1168577280).

781020936 is an abundant number, since it is smaller than the sum of its proper divisors (1556133624).

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

781020936 is a wasteful number, since it uses less digits than its factorization.

781020936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27795 (or 27788 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 781020936 is about 27946.7517969441. The cubic root of 781020936 is about 920.9178521022.

The spelling of 781020936 in words is "seven hundred eighty-one million, twenty thousand, nine hundred thirty-six".