781382056 has 64 divisors (see below), whose sum is σ = 1821214080. Its totient is φ = 306028800.

The previous prime is 781382053. The next prime is 781382081. The reversal of 781382056 is 650283187.

781382056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×781382056² = 1221115834877574272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781382053) 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, 68215 + ... + 78841.

It is an arithmetic number, because the mean of its divisors is an integer number (28456470).

Almost surely, 2^781382056 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 781382056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (910607040).

781382056 is an abundant number, since it is smaller than the sum of its proper divisors (1039832024).

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

781382056 is a wasteful number, since it uses less digits than its factorization.

781382056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10754 (or 10750 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 781382056 is about 27953.2119084731. The cubic root of 781382056 is about 921.0597649060.

The spelling of 781382056 in words is "seven hundred eighty-one million, three hundred eighty-two thousand, fifty-six".